Science News

The decade that just ended was by far the hottest ever measured on Earth, capped off by the second-warmest year on record, two U.S. agencies reported Wednesday. And scientists said they see no end to the way man-made climate change keeps shattering records.

Researchers on Wednesday reported the largest-ever one-year decline in the U.S. cancer death rate, a drop they credited to advances in lung-tumor treatments.

Scientists think they’ve figured out how to make a century-old tuberculosis vaccine far more protective: Simply give the shot a different way.

To change the fate of the kittiwake, scientists are trying to model its world.

Women who use certain types of hormones after menopause still have an increased risk of developing breast cancer nearly two decades after they stop taking the pills, long-term results from a big federal study suggest.

Already pressured by the mining and forestry industry, and other development that encroach on grazing land, Sami herding communities fear climate change could mean the end of their traditional lifestyle.

Some climate scientists and activists are limiting their flying, their consumption of meat and their overall carbon footprints to avoid adding to the global warming they study.

The government launched a new program on Tuesday to provide an HIV prevention drug for free to people who need the protection but have no insurance to pay for it.

The world continues to increase the amount of heat-trapping carbon dioxide it pumps into the air, but it’s not rising as fast as in the previous couple years.

New data about the pace of climate change have called into question how much of the Everglades can ever be salvaged — and what that even means.

To save Brazil’s giant anteaters, scientists are grappling with one of the planet’s most transformative forces: roads.

Following the lead of the U.S., other nations have designated marine sanctuaries and protected areas, which now cover about 6% of the world’s oceans — a bonanza for researchers but, more importantly, an important tool for safeguarding the seas.