Physicists have found a way to foil a classic oobleck science trick
The cornstarch and water mixture solidifies under impact. A new technique makes it stay liquid

Runners can cross a liquid mixture of cornstarch and water, which solidifies when hit by footfalls. But now scientists have discovered a way to sink such runners.
Brett Morrison/Beakerhead/Flickr (CC BY-NC-ND 2.0)