The environmental impact of aspirational recycling, where people try to recycle items that can't be recycled, can do more harm than good.
A 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.
This rare video, showing two megamouth sharks swimming off the coast of San Diego, is scientists' 'only knowledge' of the sharks' social lives.
Animals, especially those on land, can't grow indefinitely. The reason has to do with the square-cube law.
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?
Five 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.
The discovery of a tightly packed nesting ground from the Cretaceous period in India suggests that titanosaurs laid eggs and left their offspring behind.
A previously unknown extinct tortoise was revealed in an investigation on these giants' evolutionary history.
Glassfrogs 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.
A female zebra shark conceived her pups through 'virgin birth,' despite sharing a tank with two males.
A parasite that can alter animal behavior is changing the habits of infected wolves in Yellowstone, increasing aggression and goading them into taking greater risks.
A global drop in oxygen levels about 550 million years ago led to Earth's first known mass extinction, new evidence suggests.
Staving 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.
The 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.
A 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.
We are not yet sure how long COVID-19 immunity lasts, but experts agree that there is little cause for alarm and that a vaccine will likely still be successful.
Scientists use herd immunity to describe the point at which a population is sufficiently immune to a disease to prevent its circulation.