An Experiment Repeated 600 Times Finds Hints to Evolution’s Secrets
In a lab in Atlanta, thousands of yeast cells fight for their lives every day. The ones that live another day grow fastest, reproduce quickest...
F.D.A. Advisers Say Benefits of Over-the-Counter Birth Control Pill Outweigh Risks
A panel of advisers to the Food and Drug Administration voted unanimously on Wednesday that the benefits of making a birth control pill available without...
Meet the Roving Veterinarians Caring for Mexico’s Rural Horses
LAS PALMITAS, Mexico — Pedro Parra stood by his horse’s side as the animal dropped to the ground under the weight of anesthesia. Its four...
Pancreatic Cancer Vaccine Shows Promise in Small Trial
Five years ago, a small group of cancer scientists meeting at a restaurant in a deconsecrated church hospital in Mainz, Germany, drew up an audacious...
As Covid Emergency Ends, U.S. Response Shifts to Peacetime Mode
On Thursday, three years and 100 days after the Trump administration declared the coronavirus a public health emergency, the Biden administration will allow the emergency...
F.D.A. Advisers Weigh Allowing First U.S. Over-the-Counter Birth Control Pill
It was like a tale of two birth control pills. At a hearing Tuesday to consider whether the Food and Drug Administration should authorize the...
Ecuador Announces a Debt-for-Nature Deal for Galápagos Conservation
The News Ecuador announced a record-setting deal on Tuesday designed to reduce its debt burden and free up hundreds of millions of dollars to fund...
Gilead Wins Key Patent Rights Suit Over PrEP Drugs for Preventing HIV
A federal jury in Delaware on Tuesday found that the federal government did not have an ownership claim to lucrative drugs to prevent H.I.V. that...
When Should Women Get Regular Mammograms? At 40, U.S. Panel Now Says.
Alarmed by an increase in breast cancer diagnoses among younger women and persistently high death rates among Black women in particular, health experts on Tuesday...
Quaoar Had One ‘Impossible’ Ring, Then Astronomers Found Two
Why It Matters Scientists still do not fully understand how dust and gas in the early solar system coalesced into moons and planets. Like the...
Bears, Binoculars and Bucket-List Birds: A 15-Day Tour in Ecuador
We spent five blissful days at Sani Lodge, which is owned and operated by the Indigenous Sani tribe. We watched the sun rise over the...
Get Ready to See More of the Northern Lights
In the southern hemisphere, aurora australis, or the southern lights, are typically visible from Antarctica, Australia and south of Argentina. Their visibility has also expanded....
Theodor Diener, Who Discovered the Tiniest of Infectious Agents, Dies at 102
Finding something infinitesimally tiny is never easy. But it’s much harder when the searcher doesn’t know what to look for. Theodor Diener, a plant pathologist...
Overlooked No More: Alice Ball, Chemist Who Created a Treatment for Leprosy
This article is part of Overlooked, a series of obituaries about remarkable people whose deaths, beginning in 1851, went unreported in The Times. On New...