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What is the deadliest spider in the world?Although nearly all spiders are venomous, a few stand out from the crowd for their potent toxins. So, which spider is the deadliest in the world?
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Aspirational recycling: How bad is it to put things in the recycling that can't be recycled?The environmental impact of aspirational recycling, where people try to recycle items that can't be recycled, can do more harm than good.
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Medieval Swahilis and Persians paired up 1,000 years ago in East Africa, ancient DNA revealsA new ancient DNA study help confirm, but also "contradict and complicate" the historical narrative that Swahilis paired up with Persians 1,000 years ago in East Africa.
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Watch 2 megamouth sharks caught on video for the 1st time everThis rare video, showing two megamouth sharks swimming off the coast of San Diego, is scientists' 'only knowledge' of the sharks' social lives.
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How big can animals get?Animals, especially those on land, can't grow indefinitely. The reason has to do with the square-cube law.
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How did humans first reach the Americas?During the last ice age, which route was taken by the first humans to reach the Americas, and did they travel by foot, boat or both?
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Plants 'slept' with curled leaves 250 million years ago, ancient insect bites revealLeaves from the Permian period curled up at night, fossils of symmetrical insect bites show.
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'Leonardo DiCaprio' snake with bright orange eyes discovered in Panama jungleFive species of previously unknown snakes with stunning eyes were discovered in jungle trees, and one was named after Leonardo DiCaprio. But mining threatens them all.
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Do elephants really 'never forget'?Elephants are known for their extraordinary memories, but is it true that they never forget?
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'Staggering number' of titanosaur nests discovered in India reveals controversial findings about dino momsThe discovery of a tightly packed nesting ground from the Cretaceous period in India suggests that titanosaurs laid eggs and left their offspring behind.
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Extinct giant tortoise was the 'mammoth' of Madagascar 1,000 years agoA previously unknown extinct tortoise was revealed in an investigation on these giants' evolutionary history.
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Transparent glassfrogs 'vanish' at night by hiding red blood cells in liverGlassfrogs can render themselves nearly invisible while they sleep with a unique trick; they pack nearly 90% of their red blood into one of their organs.
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Female zebra shark opts for 'virgin birth' even when sharing a tank with healthy malesA female zebra shark conceived her pups through 'virgin birth,' despite sharing a tank with two males.
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What is Occam's razor?Is the simplest explanation always the best one, as Occam's razor states?
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Does gravity make you age more slowly?If you're at sea level, or you age more slowly or faster than someone at the top of Mount Everest?
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Mind-controlling parasite turns wolves into pack leadersA parasite that can alter animal behavior is changing the habits of infected wolves in Yellowstone, increasing aggression and goading them into taking greater risks.
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Scientists just found a hidden 6th mass extinction in Earth's ancient pastA global drop in oxygen levels about 550 million years ago led to Earth's first known mass extinction, new evidence suggests.
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Global CO2 emissions are cooking the planet and 'show no sign of decreasing,' report warnsStaving off the worst impacts of climate change means preventing global temperatures from rising more than 1.5 degrees Celsius above preindustrial levels. But CO2 emissions are so high that we are slated to cross that line within a decade.
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Crows outthink monkeys, can grasp recursive patternsIn cognitive tests for recognizing certain types of patterns, crows outperformed monkeys.
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Watch an ancient ice sheet cover the British Isles then vanish, in eerie time-lapse animationThe rapid decline of the British-Irish Ice Sheet thousands of years ago may hold lessons for how melting ice sheets in Greenland and Antarctica will influence sea-level rise in the future.
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Is Atlantic hurricane season getting worse (and is climate change to blame)?Recent studies have linked climate change to environmental conditions that fuel hurricane season.
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Terrifying megalodon attack on whale revealed in 15 million-year-old fossilsA megalodon tooth found suspiciously close to two fractured whale vertebrae may reflect one small whale's heroic escape from the jaws of a giant prehistoric shark.
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Are penguins really monogamous?It depends on how you define monogamy.
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Video reveals baby steps of newly hatched ‘walking’ sharksEpaulette sharks can use their fins to "walk" underwater and even on dry land.
