23andMe and other genetic testing companies promise to reveal your family's past. But what are they actually finding? By Brian Resnick.

The hope of gene therapy could be crushed by its expense unless there are more rational ways of paying for it. By Michael Sherman.

Gene therapies that turn the body into a designer antibody factory could bypass drawbacks of expensive treatments. By Amanda Keener.

Rapid glacier retreat could put coastlines underwater sooner than anticipated. Written by Richard P. Alley.

Current guidelines for sun exposure are unhealthy and unscientific, controversial new research suggests... By Rowan Jacobsen.

Satellites are tracking weather and movements of ships and air traffic. Arrgh! they might even chase pirates matey! By Sarah Scoles.

Unlike our ape cousins, humans require high levels of physical activity to be healthy. By Herman Pontzer.

Microrobots fly, walk and jump into the future. By Jennifer Huber.

How Riot Games' Naomi McArthur keeps the peace in online gaming and how those lessons can extend to real life. By Alexander Gelfand.

As more and more women go under the knife in pursuit of curves, it's clear they are paying with their health. By Eva Wiseman.