Engineering

Scientists program materials just by spinning them

There is something universally appealing about the slap bracelet, and the way a simple tap causes it to switch between a straight shape and a curled one. What you probably didn't know is that a slap bracelet's satisfying ...

Engineering

Hidden math link helps designers build fantastic shapes

Termite mounds are remarkable structures that regulate temperature, balance airflow, and maintain structural stability in some of Earth's harshest climates. And like other irregular, disordered systems, they can be difficult ...

Robotics

Tiny, knotted robots jump, fly and plant seeds

When a knot lets go, it doesn't just fall apart. It snaps. That simple observation led Penn Engineers to rethink what a knot can do. Instead of treating it as something that holds tension, they asked a different question: ...

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