How To Find The Correlation Coefficient For 'R' In A Scatter Plot
Data analysis is a pretty important skill to understand when it comes to science and research. The correlation coefficient is a big tool in that practice.
Read MoreArchive for February 2025
Back to Archive IndexAlgebra (14)
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How To Calculate A 1:10 Ratio
Ratios are a common way to compare parts to a whole, much like fractions. And if you're looking to calculate a 1:10 ratio, here's how you can do it.
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How To Factor Polynomials Of Degree 3
Factoring polynomials can be a helpful process, but high-degree ones can get a little tricky. Here's a guide for when you encounter third-degree polynomials.
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How To Calculate A Sigma Value
In statistics, you might want to know just how much a data set varies, and in that case, calculating a sigma value would be just what you need.
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How To Convert HP To KVA
Horsepower is an important unit when it comes to the power that something can output, but in case you want to see that figure in kVA, here's how to do that.
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How To Convert Hertz To Motor Rpm
You might find frequencies given in terms of hertz, but when it comes to cars, rpm might be a more helpful unit. Here's how you can convert between them.
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How To Calculate Weighted Class Grades
In classes, a given project or test might matter more than another. In that case, you'll need a little math to calculate your weighted class grade.
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How To Calculate Success Rate
Success rates can be pretty important in plenty of different fields, whether you're talking about business or sports. Here's an easy way to calculate them.
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How To Find A Vector That Is Perpendicular
Sometimes, when you're given a vector, you have to determine another one that is perpendicular. Here are a couple different ways to do just that.
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How To Calculate An Aggregate
Sometimes in life, it might prove helpful to know what an aggregate is and how to find it. Both the answer to that question and the process are simple, though.
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How To Factor On A TI 84 Plus
Sometimes, advanced mathematics are a little too complicated to do by hand. In such a case, it's helpful to know how to make the best of graphing calculators.
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How To Convert SCFM To CFM
Air capacities can be tricky, given how pressure and temperature can change volume. Due to that, it's important to know how to convert between measurements.
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How To Find Z-Scores On A TI-84 Plus
When it comes to statistics, one of the ways to standardize data sets is to use something called a z-score. Here's how you can find it on a TI-84 Plus.
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How To Change Any Number To A Percent, With Examples
Knowing how percentages work can be a pretty helpful thing in many different aspects of life. Here's how you can convert any number into a percentage.
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Astronomy (19)
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5 Ancient Artifacts That Are Made From Meteorites
Strange metallic rocks have been falling from the sky for millennia, and sometimes those rocks are turned into surprising items.
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Details Most People Don't Know About Life On The ISS
Life in space is very different from life on Earth; that much is pretty obvious. But what does the regular routine of an astronaut actually look like?
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Top 5 Coolest Things The Curiosity Rover Has Found On Mars
The Curiosity rover has been carrying out its mission on Mars for many years, and it's made some pretty cool discoveries. Here are a few of them.
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The 5 Youngest Planets Ever Discovered
Exoplanets present quite a few mysteries (and potential answers to long-standing questions) for astronomers. And that's especially true of young exoplanets.
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When Did Earth Get Its Moon
The moon is Earth's longtime, familiar companion, the story of when and how it got there is actually a bit of an unanswered question in astronomy.
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Why The Moon's Atmosphere Is So Different From Earth's
The fact that you can't breathe on the moon probably isn't surprising. That said, the moon does have an atmosphere; it's just very different than Earth's.
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The Story Of The Astronaut Who Returned From Space To Find His Country Didn't Exist
The fall of the Soviet Union was a hugely consequential event in history, but it also had some strange side effects that might not be as well known.
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What Is The Difference Between The Lunar Calendar & The Solar Calendar?
Methods of tracking time have been around for millenia, but not all calendars used by ancient civilizations were the same. Here are the major differences.
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Earth's Moon Will Experience A Rare Color Change In March 2025
Early 2025 has already played host to some spectacular astronomical events, and there are more to come. In March, look to the moon to watch it change color.
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Uranus And Neptune's Deepest Oceans Make Earth's Look Like Puddles
Earth's oceans are mysterious, largely unexplored places, but the enormous oceans of Neptune and Uranus have them beat. Here's what scientists know about them.
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NASA Is Tracking A Rare Planet Unlike Anything In Our Solar System
While our solar system is a fascinating place on its own, exoplanets are even more of a mystery. And one exoplanet in particular is something quite new.
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A Rare Lunar Event Could Reveal Stonehenge's Secrets
It's long seemed like Stonehenge harbors many secrets, and it's not keen on giving them up. But a rare lunar event might finally give us some answers.
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The Characteristics Of The Eight Planets
The planets in the solar system have long held a place in human history and culture, but there's also plenty to know about the planets themselves.
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Here's Why Venus Looks Yellow In The Night Sky
When you take a look deep into the night sky, Venus might look like it's noticeably yellow. Here's the science behind why it appears that way.
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How A NASA Experiment Might Have Destroyed Life On Mars
Researchers have been looking for life on Mars for a long time, and they might have found it on one occasion, only to destroy it at the same time.
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The Smelly Truth About Uranus
While space harbors plenty of mysteries, it turns out that Uranus' smell isn't one of them. Here's the explanation for why it's so uniquely stinky.
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The 305-Meter Telescope Made Famous By James Bond That Collapsed In Real Life
The dramatic finale of "Goldeneye" saw James Bond fighting over a giant radio dish, and in 2020 that real-life 305-meter telescope collapsed after 57 years.
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We Finally Know What A Meteorite Sounds Like When It Hits The Earth
For all that's known about meteorites, there's relatively little footage of them hitting Earth. Which makes this particular recording something quite special.
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The 13 Biggest Mysteries About Black Holes Science Still Can't Explain
Space is already filled with plenty of mysteries, and black holes may be among the strangest. Here are some of the questions scientists still have about them.
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Biology (12)
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What We Know About The Animals Evolving At Chernobyl
The Chernobyl nuclear power plant has been abandoned by humans for decades, but the animals never left. The ways they have been adapting are surprising.
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How DNA Evidence Finally Exposed The Potential Identity Of Jack The Ripper
The case of Jack the Ripper is one of the most infamous unsolved murder cases in history, and DNA analysis might have revealed a suspect. But there's a catch.
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Alexithymia: The Obscure Phenomenon That Affects 10 Percent Of The Population
Psychology can be a pretty complicated thing, and that's doubly true of alexithymia, a condition that those who have it might find it difficult to describe.
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The Correlation Between Standing On One Leg And Your Lifespan
Most everyone is interested in the latest tips when it comes to their health, and on that front, the ability to stand on one leg might mean more than you think.
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One Of The Worst Disasters In Irish History Actually Started In South America
When it comes to one of the most infamous disasters in Irish history, there's still more to be learned, including exactly where and how it started.
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DNA Tests Revealed Skeleton Of Cleopatra's Family Member Isn't Who Researchers Thought
Nearly a century ago, researchers believed they had found the skeleton of a family member of Cleopatra, but they might have had it all wrong.
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There Are Creatures On Your Face Right Now And You Never Realized It
Microscopes have allowed us to discover a world humans can't directly see. But that's also led to the realization that these creatures are always on your face.
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11 Prehistoric Creatures That Are Pure Nightmare Fuel
Prehistoric times were pretty strange, to put it lightly, and the same could be said of the species from that period. Here are some of the scariest.
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4 Ways Holding In Urine Is Bad For Your Bladder And Your Overall Health
Sometimes, you're in a situation where you can't get to the bathroom. That never feels great, but there might also be longer term consequences than discomfort.
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What Science Has To Say About Why People Don't Return Their Shopping Carts
No grocery store would be complete without carts left abandoned in the parking lot. But do those carts actually say something about the people who left them?
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Why A Worm Regrows After It Gets Cut In Half
Some worms have the uncanny ability to regrow after being cut in half, and the science behind it, as well as notable examples, can be surprisingly complicated.
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Study Finds That Nightmares May Predict A Real-Life Illness
No one is really a fan of nightmares, and for good reason. But research has found that those nightmares might also indicate something rather serious.
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Chemistry (10)
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How To Convert pKa To Ka
Ka is an important value when it comes to the strength of acids and bases, but sometimes, it can be unwieldy. That's where the conversion to kKa comes in.
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The Worst Part Of The Chernobyl Disaster Isn't What You Think
Chernobyl is an infamous disaster that's also become something of a cautionary tale. But as it turns out, there's a chance it could have been avoided.
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What Is The Difference Between Blue & Red Litmus Paper?
Litmus paper might be something that you've seen in a chemistry lab, but how does is actually work? And why are there two different colored versions?
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Scientists Accidentally Created A Sticky Substance Straight Out Of A Sci-Fi Movie
Sci-fi movies feature technology that seems far beyond our current capabilities, but that isn't always true. This new material proves that much.
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It Snows On Mars, But It's Not The Same As Earth
Everyone knows that Earth is capable of providing beautiful, snowy landscapes, but it isn't unique in that. It snows on Mars, too, but there's a bit of a twist.
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The Porous Powder That Can Capture CO2
Global warming is a major concern, with the growing presence of carbon dioxide being a big part factor. But this powder might be able to combat that issue.
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How To Make Edible Slime: The 13 Best At Home Recipes
Who doesn't enjoy making (and playing with) slime? If you want to try something new with the sticky substance, then consider trying out these edible slimes.
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How To Convert Mg To mmol/L
In chemistry, concentrations are important measurements, and it's helpful to know how to convert between them. Here's how the math works out.
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How To Calculate The Percent Abundance Of An Isotope
A single element can have multiple different forms, called isotopes, and it's possible to determine the percent abundance of those forms. Here's how.
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Molecules That Can Never Exist Naturally On Earth
Space is home to a great many oddities, and even chemistry gets strange out there. In fact, there are even some molecules that you'd never find here on Earth.
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Electronics (4)
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What Is VAC Power?
Electricity really is a staple of modern life; a lot of technology couldn't even exist without it. Everyone uses it all the time, but how does it really work?
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4 Worst Ways AI Has Affected School
AI has become a pretty hot topic, and it's one that comes with plenty of ethical questions. The topic of schooling has even been affected, and here's how.
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These Robots Were Built To Replace Humans (But Still Have To Work An 8-Hour Shift)
The fear of robots taking over human jobs isn't a new one, and not only that, but it's a reality that's a whole lot closer than you might think
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How To Charge Multiple 12V Batteries In Line
Everyone's familiar with having to recharge batteries every now and again. If you've ever wondered about the science behind that, though, here's a primer.
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Geology (2)
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5 Biggest Precious Material Deposits Ever Found
Earth is packed full of precious materials, oftentimes concentrated into specific deposits. Here are some of the largest of those known deposits.
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Top 5 Most Dangerous Supervolcanoes In The World
While volcanoes can be frightening, supervolcanoes are even scarier. These five supervolcanoes are proof of that, having drastically altered Earth in the past.
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Geometry (1)
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How To Calculate A Cross-Sectional Area
When it comes to the geometry of three-dimensional figures, you're probably not thinking about their flat cross sections. Here's how you calculate their areas.
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Math (2)
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How Do I Get The Theta Sign On My TI-84?
Theta is a common enough symbol when it comes to math, so how do you get to it on a calculator? If you own a TI-84, here's all you need to know.
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How To Calculate Variance From A Ti84
Variance is a statistical parameter that analyzes the spread, or distribution, of data. Here's how to calculate it quickly.
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Nature (36)
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Parts Of Flowers & What They Do
While flowers are beautiful and hold a special place in human culture, they're actually fairly complex organisms with quite a few different parts.
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Stages Of A Volcano Eruption
Volcanic eruptions come in many different varieties, but they also have some general, recognizable stages that they all go through. Here are those stages.
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Names Of Plants That Live In Grasslands
It would seem like the plant species in grasslands are obvious, given the name, but as it turns out, the biome hosts a surprising diversity of plantlife.
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Reptiles That Give Live Birth
Most of the time, when thinking of reptiles, you probably imagine them laying eggs, but that's not always accurate. Some of them actually do give live birth.
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List Of Fish That Are Bottom Feeders
The fish that feed at the bottom of bodies of water have adapted to the very particular life they lead. Here are a few of these unique species of fish.
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What Are Convection Currents?
If you keep up with weather reports, you've probably heard about convection currents once or twice. But have you ever wondered how they actually work?
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How To Identify Snake Eggs
If you were to come upon some unidentified eggs, you would probably want to know what kind of animal laid them. If they're snake eggs, here's how you can tell.
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The Animal With The Most Powerful Punch Could Fit Inside Your Pocket
There are plenty of scary creatures on Earth (and especially in the ocean), but one of the most powerful might come as a surprise. After all, it's pretty tiny.
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Animals In The Temperate Rainforest Biome
Temperate rainforests are rather unique biomes, and no shortage of fascinating species call these places home. Here are the details of a few of those species.
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5 Times Scientists Fought Back Against Invasive Species And Actually Won
Invasive species can be quite dangerous, putting entire ecosystems at risk with just their simple presence. But sometimes, researchers are able to fight back.
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Giant Footprints Reveal Another Hadrosaur Larger Than T-Rex
While the T-Rex is famous for its fearsome stature, recent research has shown that it wasn't actually the largest dinosaur. Nowhere near it, in fact.
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Not Even A Nuclear Blast Could Stop One 290 Million-Year-Old Tree Species
The destruction wrought on Japan by the atomic bomb in 1945 can't be understated. Yet, these trees somehow survived to become symbols of peace and hope.
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Inchworm Life Cycle
While moths and inchworms are pretty well known creatures, the exact details of their life cycle might not be common knowledge. Here's all you need to know.
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How To Identify Spiders With White Spots
Whether you like or hate spiders, they're certainly a memorable species. And if you're looking at one with white spots, here's how you can identify it.
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The Longest Cave System In The World Is Right In Kentucky
Caves are pretty fascinating places, and larger caves might be even more interesting. In any case, this huge cave system has quite a bit going for it.
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What If The T-Rex Was Alive Today?
Dinosaurs are really big parts of the popular imagination, and that's especially true of the T-Rex. But what would the world be like if they were still around?
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Signs & Symptoms Of Rabies In Squirrels
The term "rabies" probably evokes images of feral animals and frothing mouths, but in reality, the disease is a little more complicated than that.
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The Differences Between Ferrets & Weasels
While weasels and ferrets might look a bit like each other and are members of the family, they're actually quite different. Here's how you can tell them apart.
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The Remarkable Comeback Story For One Of North America's Most Endangered Mammals
Usually, when a creature is considered extinct, it's thought to be gone forever. But that's not true of this species, which has defied the odds at every turn.
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The World's Biggest Spider Species You'd Never Want To See In Your House
Many people are scared of spiders, and that's for understandable reasons. After all, no one would want to come upon this huge spider in their home.
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10 Massive Cities That Are Actually Sinking Into The Ocean
Everyone is familiar with the skylines of massive cities, but in the future, those sights are iable to change. Instead of buildings, there might only be water.
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California Holds A Grim Record For Animal Species In The United States
California is a beautiful state with no shortage of diverse plant and animal species. Unfortunately, the fates facing those species aren't always the brightest.
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12 Venomous Species That Can Kill You In Minutes
There are many species with pretty scary defensive (and offensive) tactics, such as venom. These species in particular can be pretty intimidating on that front.
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The Invasive Species California Is Battling That's An Immediate Threat
Invasive species are causing problems all around the United States, and California is no exception. This species in particular has really wreaked havoc.
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Crabs That Are Related To Spiders
When you think about crabs and spiders, they probably seem like two very different types of animals. But in some cases, that's less true than you'd expect.
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What Is A List Of Mammals With Pouches?
Kangaroos are probably the most famous animal species with a pouch for their young, but they aren't the only ones. In fact, quite a few mammals have pouches.
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Types Of Aquatic Plants
When you think of plants, the flowers and trees of gardens and forests might come to mind. But aquatic locations have their own varied plantlife, too.
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What If You Fell Into Lava?
Volcanoes can be morbidly fascinating for plenty of reasons, as can the lava they release. But what effect might all that molten rock have on the human body?
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The Most Dangerous Animal In A Zoo Isn't A Lion
When you think of dangerous animals kept in a zoo, lions or tigers might come to mind. But by the numbers, the most truly dangerous animal is a surprising one.
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5 Invasive Species That Are Destroying Illinois
Invasive species are a nationwide problem, destroying ecosystems and crowding out native plants and animals. Here are the ones specifically plaguing Illinois.
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5 Birds That Are Actually Poisonous
When it comes to poisonous animals, birds probably aren't the first to come to mind. But there are actually a number of uniquely toxic birds.
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The Mass Extinction Event That Actually Never Happened
Mass extinction events are infamous, entirely destroying many species in one fell swoop. But this particular extinction event might not have happened at all.
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Weather The United States Can Likely Expect From La Niña In 2025
When you're talking about regular weather cycles, it's most likely that you've heard of El Niño and La Niña. The latter is set to affect 2025, but in what ways?
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12 Animal Species On The Brink Of Extinction
Between climate change and the effects of humanity on the environment, many species have been harmed. Here are a few of them that have been led near extinction.
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4 Insects That Have A Symbiotic Relationship With Ants
Symbiotic relationships between species are both common and incredible, including those between ants and these four insects, as well as one honorable mention.
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Why Some Birds Fly South For The Winter
People in northern climates are familiar with flocks of birds flying south in the winter, but why do they do it, and why don't they just stay where it's warm?
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Physics (3)
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How To Convert KWh A Year To KW
If you've looked at an energy meter, you might have seen the unit KWh, but what does it mean? And what can you really make of the data it's giving you?
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Instructions For A Galileo Thermometer
Galileo thermometers might look quaint, with their colorful balls of liquid, and they're often decorative pieces. But you can read them, and this is how.
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Here's What Happened When Physicists Simulated A Black Hole In A Lab
Black holes are as dangerous as they are distant, so scientists set out to simulate one in a lab. What happened next would make Steven Hawking smile.
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Science (4)
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5 Most Stunning Discoveries Archeologists Ever Found In Greece
Ancient Greece has long held the fascination of both the public and archaeologists, and for good reason. These incredible discoveries are really just the start.
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The Ancient Weapons Discovered In An Unassuming Desert Lake Bed
There are many different types of ancient weapons, and those similar to the ones found in a simple lake bed tell quite the interesting tale about humanity.
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Almost Famous: How William Weston Became England's Christopher Columbus
When you think about Europeans landing in the "new world," Christopher Columbus likely comes to mind. But the name of a different man probably should as well.
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Antarctica's Date Of Discovery Is More Complicated Than You'd Think
Antarctica is a place rife with opportunities for discovery, but strangely enough, the discovery of the continent itself is something of a contested topic.
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Technology (3)
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What Is A Condensing Unit?
Condensing units are an important component used across many different industries, as well as in normal, everyday life. Here's how the technology works.
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The South Korean Technology That's Reinventing The Wheel
Typically, everyone is led to believe that there's no point in trying to reinvent the wheel, but some new ideas might have just proven that old saying wrong.
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A Quantum Computer Broke RSA Encryption, But It's Not Time To Panic Yet
In 2024, a research team claimed to have used a quantum computer to break a core part of internet security, RSA encryption, but it's not time to panic just yet.
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