They observed a water contact angle of more than 160 degrees—the larger the angle formed by the surface of a water drop with the substrate, the better the hydrophobic properties of the material.

If you’re like us and you’ve been wondering where those viral videos of single water drop chemical reactions are coming from, we may have an answer. [yu3375349136], a scientist from Gua… ...

Los Angeles city fire helicopter Chief pilot Dan Child (L) and lead pilot Brandon Prince pose with helicopter Air-4, one of many helicopters they use to make water drops with pinpoint precision on ...