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The decision could present a threat to President Trump’s agenda to quickly expand oil and gas drilling by offering opponents a roadmap to legal challenges.
What appeared to be a cyst in a healthy fetus turned out to be an unformed twin “absorbed” early in pregnancy, connected by a second umbilical cord and still growing.
The success of NASA’s MarCO mission means that so-called cubesats likely will travel to distant reaches of our solar system.
Researchers identified the master control gene that enables worms to grow a new body, capturing the imagination of some humans looking for a fresh start.
NASA’s Osiris-Rex and Japan’s Hayabusa2 spacecraft reached the space rocks they are surveying last year, and scientists from both teams announced early findings on Tuesday.
Scientists from the New Horizons mission presented their latest findings about the small distant object visited by the NASA spacecraft at the start of the year.
The Food and Drug Administration is taking another look at breast implants because of renewed safety concerns.
The medication works quickly, within 48 hours. But it’s an expensive infusion and requires a stay in a medical center.
For 19 years, police were unable to identify the person who fatally shot two 17-year-olds. Then they turned to the technique used in the Golden State Killer case.
Scientists at a conference in Houston presented the concept for a flyby mission to study a mysterious moon that may contain an ocean.
The whale’s grisly death renewed focus on the problem of plastics ending up in oceans. The Philippines is the third-biggest contributor of such waste.
Research shows they might act more like boys when they’re young, struggling in school, but then face sexism when they’re grown.
The drugs are not just overprescribed. They often pose special risks to older patients, including tendon problems, nerve damage and mental health issues.
Dr. Uhlenbeck helped pioneer geometric analysis, developing techniques now commonly used by many mathematicians.
Deployed on farms, industrious dung beetles clean up livestock waste, improve soil and reduce harmful bacteria.
Beehives and their contents are a sensitive detector of lead emissions, a study of Canadian urban apiaries showed.
New guidelines suggest the risk of bleeding outweighs the heart benefits among healthy adults who take low-dose aspirin.
The administration will focus on more than 50 “hot spots” in the U.S. that annually account for half of new H.I.V. infections. A clinic in the Deep South sees the challenges every day.
Clouds of painted lady butterflies are flying through Southern California. The reason? Abundant rainfall that has caused an explosion of plant growth.
Returning from a trip to the Democratic Republic of Congo, the agency chief also worried that vaccine supplies could run out.
Replacement of the aortic valve with a minimally invasive procedure called TAVR proved effective in younger, healthier patients.
The rule, which scales back a ban proposed under President Barack Obama, would prohibit the consumer use of products containing methylene chloride but allow commercial use.
The plan would strip away protections for the imperiled bird on nearly nine million acres of energy-rich land in the West.
The well-known astrophysicist faced accusations of sexual misconduct involving three women. His broadcasters said they completed their investigation but did not release their findings.
About to enter a federal prison, a Massachusetts woman is not permitted to continue taking the opioid as a treatment to block cravings and withdrawal from heroin addiction.
Over a quarter of the species threatened by commercial trade are not protected by Cites, the global agreement intended to save them.
Juul and Big Tobacco have lobbied for months to protect themselves from aspects of the F.D.A.’s crackdown. As Scott Gottlieb leaves, they see an opening.
With an analysis of DNA from nearly 300 fossilized remains, scientists are peering into human prehistory in the region.
Softer foods from agricultural lifestyles may have changed the human bite, making it easier to form certain sounds.
A record 81 U.S. flights were investigated in 2018 for carrying at least one person contagious with the disease, which has had a large number of outbreaks this year.
The famous mathematical ratio, estimated to more than 22 trillion digits (and counting), is the perfect symbol for our species’ long effort to tame infinity.