Celibacy: Its surprising evolutionary advantages

Why would someone join an institution that removed the option of family life and required them to be celibate? Reproduction, after all, is at the very heart of the evolution that shaped us. Yet many religious institutions ...

NASA's Mars copter flight could happen as soon as Monday

NASA's Ingenuity Mars Helicopter could make its first flight over the Red Planet as soon as Monday, the US space agency reported, following a delay of more than a week due to a possible technical issue.

Six things to know about NASA's Ingenuity Mars helicopter

When NASA's Mars 2020 Perseverance rover launches from Cape Canaveral Air Force Station in Florida later this summer, an innovative experiment will ride along: the Ingenuity Mars Helicopter. Ingenuity may weigh only about ...

Six things to know about the Ingenuity Mars helicopter

When NASA's Mars 2020 Perseverance rover launches from Cape Canaveral Air Force Station in Florida later this summer, an innovative experiment will ride along: the Ingenuity Mars Helicopter. Ingenuity may weigh only about ...

NASA's Mars helicopter attached to Mars 2020 rover

Engineers attached NASA's Mars Helicopter, which will be the first aircraft to fly on another planet, to the belly of the Mars 2020 rover today in the High Bay 1 clean room at the Jet Propulsion Laboratory in Pasadena, California.

How human networks drive inequality, social immobility

To understand why people succeed or fail, look at their circle of friends. Like it or not, said Stanford economist Matthew Jackson, people's fates are closely connected to their human networks.

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