It took a YouTube video, a walk-in freezer kept at negative 20 degrees Celsius, and some very cold-tolerant engineering students for researchers to finally figure out why freezing soap bubbles resemble glitter in a snow globe. The trick itself is a popular winter science experiment when temperatures dip below freezing: head outside, blow a soap bubble, gently plop it onto some snow or ice, and watch as crystals dance around on the film until the entire thing is a delicate ice ball. It’s visually stunning — but until very recently, people didn’t know exactly why bubbles freeze in this particular, mesmerizing way.
Normally, when a drop of water or a puddle freezes, it starts solidifying into ice at the coldest spot, where it comes in…
from The Verge – All Posts http://bit.ly/2MV1TQa
via IFTTT