New York City's normally good air quality rating recently plummeted to the worst of any major city in the world, as wildfire smoke drifted over the city from Canada.
Brilliant new signals from a far-off galaxy confirm that the system is anchored by a pair of black holes locked in a daring dance.
A prehistoric site in Greece pushes back the earliest known hominin presence in the region by up to 250,000 years.
Experiments suggest that taurine, an unusual amino acid, can extend some animals' life spans, but it's unclear if it would work in humans.
A necropsy revealed that the animal may have been infected with avian influenza, which would be "a big deal" if it is confirmed by further testing, scientists say.
The 1.5-million-light-year-long gas trail was caused by a group of galaxies moving 3 million miles per hour
A record-breaking drilling attempt, which dug more than a kilometer into an underwater mountain in the Atlantic Ocean, has given scientists a treasure trove of rocks to study for clues to Earth's inner workings.
A dentist noticed a lump on a patient's tongue, and it turned out to have an unusual cause.
Octopuses edit their RNA to adapt to fluctuating temperatures, from the warm waters of summer to chilly ocean temperatures in winter.
A new study shows that gene therapy could be an effective form of birth control for cats.
About 1,700 years ago, liquid gypsum was poured over the remains of an elite family in Roman Britain.
One, four or five? Not all experts agree on the number of oceans on our planet.
New simulations show that dying stars release enormous "cocoons" of gas that may rattle with space-time ripples called gravitational waves.
Lead aprons were designed to protect reproductive organs from radiation. But are they actually necessary?
Compounds from 1.6 billion years ago reveal a microbial transition that set the stage for much of today's life on Earth.
Astronomers using the James Webb Space Telescope discovered evidence of complex organic molecules in a galaxy 12.3 billion light-years away — the furthest and oldest ever detected.
Researchers reconstructed the evolutionary origins of primate masturbation and found it was an ancestral trait that goes back to the ancestor of all moneys and apes.
Researchers captured Cassius in 1984 because the "big old gnarly crocodile" was causing trouble on a cattle farm, and ferried him to Green Island, Australia, where he still lives today.
Researchers created a facial approximation that reconstructs what the ancient Egyptian pharaoh Tutankhamun may have looked like.
