Most fire is orange, or maybe shades of yellow, white or blue. But it turns out if you spray sodium salts and ethanol into a flame and then view it in front of a sodium vapor lamp, it looks black. Natasha Simons of The Royal Institution explains the science behind this phenomenon.
After creating a mix of chilled acetone and water that was both slushy and flammable, The King of Random tried to make fiery snowballs using a similar technique. After a few false starts, he succeeded with gasoline-soaked snowballs. Kids, don’t try this at home.
The Action Lab shows off a cool property of polyethylene glycol, a chemical with a crazy high molecular weight. As a result, they stick together in very long chains, so once he pours out a little bit of the liquid, the rest follows on its own, much like metal beads do.