When liquids behave like solids

(Phys.org) —When a rubber ball and a droplet of water are compressed onto a solid surface, they behave very differently. For the ball, the compression process is reversible, so the ball retains its original form when decompressed. ...

Cyclogyro Flying Robot Improves its Angles of Attack

(PhysOrg.com) -- In the past few decades, researchers have been investigating a variety of flying machines. Most studies have focused on improving the flying performance of standard flying mechanisms, rather than developing ...

Bats use leaves as mirrors to find prey in the dark

On moonless nights in a tropical forest, bats slice through the inky darkness, snatching up insects resting silently on leaves—a seemingly impossible feat. New experiments at the Smithsonian Tropical Research Institute ...

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