When a knot lets go, it doesn't just fall apart. It snaps. That simple observation led Penn Engineers to rethink what a knot ...
An insect-scale robot that jumps using only light has completed 188 continuous leaps without a single electronic component. The soft machine bends, snaps and resets itself automatically, powered ...
Researchers at Penn Engineering have turned a common nuisance—a knotted string—into a high-performance, heat-activated ...