How long does immunity last after an infection? Are rapid tests always accurate? How often is a booster in order? In this installment of our FAQ series, we look into questions about "COVID time."
Scientists looked at trees to better understand the interplay between temperatures and droughts in the Western U.S. Human-caused climate change is exacerbating both.
The ancient extinct shark that starred in the film The Meg is thought to be the largest shark that ever swam the Earth. But there's debate over what it really looked like.
A new study of kelp fossils from the coast of Washington state show that kelp forests, which host all manner of marine life, developed tens of millions of years ago.
The megalodon went extinct 3.6 million years ago, and is thought to be the largest shark that ever swam the Earth. But the megalodon may not have been as big as once thought, some researchers suggest.
Data from the James Webb Space Telescope indicate that a galaxy known as GN-z11 has a supermassive black hole at its center — one that's far more massive than astronomers expected.
Researchers say they've identified the oldest known Tyrannosaurus, shaking up the ongoing debate over how and when the dinosaurs arrived in North America.
Are we in a surge? How would we know? Is winter now "COVID season?" And what do you do if your whole family got the coronavirus over the holidays? We tackle readers' coronavirus questions.
Researchers found roughly 240,000 detectable plastic fragments in a typical liter of bottled water. Most of them were nanoplastics — particles less than 1 micrometer in size.
Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of light greenish blue.
A new study has examined the potential ramifications of declining an invitation for a social outing, and found that people tend to overestimate just how much it matters.
A new study showed that cats fetched objects instinctively, in the absence of overt training. Fetching is defined as when the animal retrieves an object that's thrown.
An experimental technology that might someday allow infertile couples, as well as gay and trans couples, to have genetically related children stirs hope. So far, the technique has worked in mice.
More scientific evidence has surfaced to show that while Mittens may be your sweet angel, letting her roam outside is also a big threat to biodiversity.
