How to Make a Soap Bubble That Lasts a Year

Researchers have produced bubbles with a shell made of water, miniscule plastic particles and glycerol. The team monitered how the bubbles mass and shape evolved over time,. They report that they remained essentially unchanged for up to 465 days - more than 200 thousand times longer than normal. Hippos can recognizea covers honking voices by making their own sounds and spraying dung.