Foetal brains begin to fold around the midpoint of the third trimester, but little is known about the actual process. A new model, in which a hunk of gel was made to swell in a liquid bath, shows how it happens in surprisingly accurate detail.
Nearly all diseases take time and money to diagnose. A new test that exploits a quirk of physics could make blood tests for certain diseases faster, cheaper, and easily performed in virtually any setting.