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How Many Steps Should You Take a Day?

Humans, once in constant motion as hunters and gatherers, are moving less than ever. At first,…

Fact-Checking Trump’s Claim That Google ‘Manipulated’ Millions of Votes for Clinton

What President Trump Said Wow, Report Just Out! Google manipulated from 2.6 million to 16 million…

Spraying Antibiotics to Fight Citrus Scourge Doesn’t Help, Study Finds

When the Environmental Protection Agency approved the spraying of certain antibiotics three years ago to fight…

Meeting a Russian Scientist? He Might Need to Report on You

MOSCOW — Russian scientists on Wednesday ridiculed a government plan to impose Soviet-style restrictions on their…

Dr. John Hansen, Who Made Marrow Transplants Safer, Dies at 76

Dr. John A. Hansen, an immunologist whose pioneering research made bone marrow transplants safer and vastly…

Do Older People Have a Different Smell?

During an extended period of travel last year, my husband and I lent our house in…

Another Baseball Mystery: Why Do Players Seem to Live Longer?

Major League Baseball has its problems. Attendance has slipped, fans complain the pace of play has…

Deadly Germ Research Is Shut Down at Army Lab Over Safety Concerns

Safety concerns at a prominent military germ lab have led the government to shut down research…

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 Brutal Disease Kills Monkeys. Flies Could Be Spreading It.

In the jungles of Ivory Coast, monkeys and chimps forage for food, sleep in trees and…

Falling Trust in Government Makes It Harder to Solve Problems, Americans Say

It will probably come as no surprise that most Americans distrust the federal government. A new…

With $1 Billion From Microsoft, an A.I. Lab Wants to Mimic the Brain

SAN FRANCISCO — As the waitress approached the table, Sam Altman held up his phone. That…

This New Liquid is Magnetic, and Mesmerizing

Lodestone, a naturally-occurring iron oxide, was the first persistently magnetic material known to humans. The Han…

It May Not Seem That Way, but Politicians Often Do What Voters Want

ImageTeachers crowded the lobby of the Arizona Senate last year as state lawmakers debated the budget. CreditMatt…

Google Glass Has an Afterlife as a Device to Teach Autistic Children

SAN FRANCISCO — When Esaïe Prickett sat down in the living room with his mother, father…