What does it take to prep humans for a trip to an asteroid or a martian moon? Starvation? Isolation? Recycling feces for food? NASA's newest astronauts begin a grueling training regimen this fall to find out
By Dawn Stover
Meet ten young geniuses shaking up science today. They're helping to keep us healthy, prevent disasters, and make green energy cheaper than coal. Lucky for us, our future is in their capable hands
Every day we're exposed to thousands of man-made chemicals, some of which seep into our bodies and remain there for decades. What that means for our health, we don't fully understand--but I subjected myself to a battery of new tests in search of answers. By Arianne Cohen
The build continues, plus four green doors and windows to retrofit your own home
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.