Fallstreak holes form in these high to mid-level (cirrocumulus or altocumulus) clouds which are comprised of tiny water droplets that are below the freezing temperature but have not yet frozen (called supercooled water droplets). Airplanes passing through the cloud help the supercooled water droplets freeze. Air expands and cools as it passes over the wings and the propellor blades, decreasing the ambient temperature just enough to allow the droplets to freeze. The ice crystals grow and start to fall, while causing the water droplets around the ice crystals to evaporate. This leaves a large hole in the cloud with brush-like streaks of ice falling below it.
CBS News reports that Hurricane Dorian has become more alarming overnight and may grow to Category 4, making it “very dangerous” to the Miami-area coastline it’s headed toward. There’s a good chance Dorian will power its way into a Category 4 with potentially catastrophic 140 mph winds before making landfall on the mainland U.S., the […]
As cool as your smartphone is, it can’t do everything. When a job requires a little elbow grease, a multitool is a great thing to have around – and might just save your life in the right situation. Here’s a roundup of some of the latest multitool designs, which have come a long way since […]
Whether you own or rent your place, insurance on that home is a necessary hassle – but a new tech-driven company called Lemonade is starting to show that while it might indeed be a necessity, it doesn’t have to be a hassle. Here’s the way insurance typically works: You pay premiums and hope an accident […]
People tend to keep luggage around for a long time. And why not? New suitcases are pricey, and no matter how banged up or patched up that old bag gets, it still holds your clothes. Right? Maybe not. Here are 15 travel bags and accessories that make a strong case for upgrading your gear. They’ve […]