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.
On Thursday night, punctuating the uprising against racial injustice, lightning struck the Washington Monument. A separate lightning strike near the White House that evening severely injured two soldiers from the South Carolina Army National Guard. (USA Today)
• Super Cyclone Amphan became the strongest storm ever recorded in the Bay of Bengal on Monday night • #Amphan is expected to make landfall on Tuesday, May 20 • Storm surge of up to 15 feet on anticipated landfall in West Bengal forecast Wednesday In India and Bangladesh, millions of people are trapped in […]
It’s March 19, the day when folks north of the equator can step out (of the toilet), take a deep breath (of 70-degree bone-dry forced air) and enjoy the flowering sight of the first day of spring (on a screen). Photos: Pexels (CC0 1.0)
Game engines aren’t just the lifeblood of the video game industry. They may soon be the lifeblood of Hollywood. Since emerging in the late ’90s, the Unreal game engine has quickly become one of the world’s foremost tools for game creators. Now, Disney’s hit Star Wars spinoff series The Mandalorian is using Unreal as well. […]
Apple AirPods have become the default earbuds beloved by millions. Unfortunately, they also cost $159, so it’s no surprise that since they were first introduced in 2016, companies have battled to produce comparable headphones at a lower price. The UK-designed and engineered Veho STIX true wireless earphones may have cracked that particular problem, striking a […]
Instagram isn’t just for tweens and foodies. In fact, the image-heavy platform not only wants to mint new Instagram influencers — it also wants to make them rich. In the last few weeks, the company announced ad revenue sharing on IGTV videos, special badges you can buy from your favorite accounts through Instagram Live, merchandise […]