Stealth

​Bats eat a lot of moths, which they locate in the dark via echolocation. According to new research, however, some moths have evolved sound-absorbing fur as a passive means of defence – and it could inspire advances in human technology.

A team of researchers has developed a "cloaking device" that works underwater. The new metamaterial shield is able to intercept and bend underwater sound waves, like sonar, around it without scattering them – making it appear as if the cloak and anything within it isn't there at all.

QinetiQ and Vestas have created stealth technology for wind turbines which make them virtually invisible to radar

Active cloaking, a newly theorized approach to invisibility, brings us one step closer to achieving invisibility in the visible light spectrum.