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London Lab Advances Use of A.I. in Health Care, but Raises Privacy Concerns

SAN FRANCISCO — Each year, one out of every five patients admitted to a hospital in…

A Skull Bone Discovered in Greece May Alter the Story of Human Prehistory

A skull fragment found in the roof of a cave in southern Greece is the oldest…

Stored in Synapses: How Scientists Completed a Map of the Roundworm’s Brain

The tiny, transparent roundworm known as Caenorhabditis elegans is roughly the size of a comma. Its…

Who Were the Ancestors of Native Americans? A Lost People in Siberia, Scientists Say

A skeleton in Siberia nearly 10,000 years old has yielded DNA that reveals a striking kinship…

Study Pinpoints Source of Banned Gas That Saps Ozone Layer: Eastern China

Want climate news in your inbox? Sign up here for Climate Fwd:, our email newsletter. Rogue…

Matter: Scientists Created Bacteria With a Synthetic Genome. Is This Artificial Life?

Scientists have created a living organism whose DNA is entirely human-made — perhaps a new form…

Scientists Create Speech From Brain Signals

“In my head, I churn over every sentence ten times, delete a word, add an adjective,…

‘Partly Alive’: Scientists Revive Cells in Brains From Dead Pigs

In a study that raises profound questions about the line between life and death, researchers have…

The Great Barrier Reef Was Seen as ‘Too Big to Fail.’ A Study Suggests It Isn’t.

MELBOURNE, Australia — For millenniums, ecosystems have withstood fires, floods, heat waves, drought and even disease…

H.I.V. Is Reported Cured in a Second Patient, a Milestone in the Global AIDS Epidemic

For just the second time since the global epidemic began, a patient appears to have been…

Can Big Science Be Too Big?

Modern science is largely a team sport, and over the past few decades the makeup of…