Indigenous nations across the U.S. lost nearly 99% of their historical land base over time, new research shows. What little land they have left is especially vulnerable to climate change risks.

In a major expansion, proposed U.S. rules would apply not only to new oil and gas operations but also older ones. Methane is a potent greenhouse gas considered key to slowing global warming quickly.

If last year was marked by the emergence of COVID-19 on a global scale, this one has been all about the new solution to end the pandemic: the vaccines.

At the opening of a United Nations climate conference in Glasgow, Scotland, António Guterres says the world is "digging our own grave" by not acting more aggressively to mitigate climate change.

Moderna says the FDA is looking into reports of a rare side effect — myocarditis, or the inflammation of the heart muscle — in those who've gotten the shot.

A solar flare eruption from earlier this week is expected to reach Earth on Saturday and Sunday, creating the potential for the aurora borealis to be visible across large parts of the U.S.

Pandemic predictions have been made — and then things would change. But based on models and studies (including a 1980s test that squirted virus up human noses), researchers have a new endgame thesis.

Although spiders are sometimes thought of as being creepy crawly animals, new evidence suggests some get scared and assess danger in almost the same way as humans.

Deputy Secretary of Defense Kathleen Hicks says the effects of climate change are already being felt. Storms have damaged U.S. bases and rising seas could submerge U.S. installations in the Pacific.

While researchers have found more than 4,000 planets in our own galaxy, this is the first time anyone has found what could be a planet that exists outside the Milky Way.