Scientists are steadily ruling out habitable conditions on the seven planets of the star Trappist-1. On one of the worlds, a nitrogen gas-rich veil remains a possibility.
A looming constitutional battle between Texas and New York is the leading edge of the escalating states' rights fight over the prescribing and mailing of abortion pills to patients in states with bans.
He was only 37 when he made a discovery that challenged the existing tenets of biology and led to an understanding of retroviruses and viruses, including H.I.V.,
The upcoming U.S. Dietary Guidelines will instead be influenced by a competing study, favored by industry, which found that moderate alcohol consumption was healthy.