For millennia, psychonauts have ingested both natural and man-made substances to see the world in new ways. Now, brain scans and other studies reveal how these buzz-builders work, helping scientists harness their power for good and expose the roots of addiction.
The galaxy brims with billions of planets, but whoa—they’re so far away! Unfortunately for would-be star trekkers, even the closest would take hundreds of lifetimes to reach with current technology. Until someone invents the warp drive, we’ll have to do our exploring with telescopes.