Category: Science

The company, owned by the Amazon founder Jeff Bezos, also received approval from the Federal Aviation Administration to launch the vehicle to orbit.

Tiny genetic alterations could help the bird flu virus enter cells in the upper respiratory tract, the C.D.C. said. But there is no sign that mutations are widespread in nature.

The probe sent a signal to Earth indicating that it had survived the closest solar encounter ever attempted by a spacecraft.

“Technostuff” built in the last 100 years outweighs all the living matter on Earth.

The agency obtained research from 3M in 2003 revealing that sewage sludge, the raw material for the fertilizer, carried toxic “forever chemicals.”

The astronauts on the I.S.S. — including two who were scheduled to return months ago — held a zero-gravity cookie-decorating contest and built a reindeer from storage bags.

It may be a longstanding practice, but critics say routine weight measurements are driving some patients away from care.

A new study is “a bit of a counterweight to the endless hyperbole about how incredibly complex and powerful the human brain is,” one researcher said.

Experts said they were “blind” to the Indian Ocean tsunami in 2004. Twenty years later, working toward a world without tsunami deaths is a challenge.