The next wave of COVID tests take advantage of some really cool molecular biology. They can be run by hospitals and doctors on-site, and many turn around results in an hour or less. SciShow’s Hank Green explains the process.
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A lot of people with coughs or fevers might be stressing out these days because they are worried that they have COVID-19. But with cold and flu season still in full swing, and the spring allergy season starting up (in the Northern Hemisphere anyway), there are plenty of other things out there that could potentially explain these symptoms. SciShow host Hank Green takes a look at the symptons and what they mean.
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One-fifth of mammals today are bats, who benefit mankind in several different ways, such as pollinating plants, regrowing forests and controlling pests. But many of them are outright dangerous, because they carry an array of diseases that are harmful to humans. While bats aren’t to blame for everything, they have played a role in the transmission of at least 12 viruses, including SARS, and maybe even COVID-19. SciShow’s Stefan Chin fills us in on the details of this aggressive, but tiny, mammal.
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The earth is our home, a land built by forces and processes, many of which are invisible, long gone and mind-bogglingly complex. And while we like to think we know a good deal about it, there are still some mysteries that scientists are looking to unravel. SciShow’s Olivia Gordon takes a closer look at some of these puzzles.
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There’s a reason why the Zumalt-Class Destroyer and B-2 Spirit plane look so strange–they’re designed for stealth. The two main obstacles for such objects are radar and infrared detection, but improved technology is finding ways around these systems. SciShow’s Michael Aranda explains.
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It used to be that you could get on a Concorde jet or Soviet Tupolev Tu-144 and fly faster than the speed of sound. But both airliners were retired shortly after the turn of the century, leaving passengers without any supersonic travel. So what the does the future hold for supersonic flight? Engineers have gone back to the drawing board in an effort to improve air travel, but their main challenge is getting past Mach I, the speed of sound, and the sonic booms that follow. SciShow’s Hank Green gives us the details.
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Water is one of the most abundant and important substances on Earth, so you think we’d know everything there is to know about it. But it turns out water is way weirder and it often behaves in ways that leave scientists with more questions than answers. Here’s more from host Olivia Gordon on SciShow.
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For years, scientists categorized dinosaurs as cold-blooded (ectotherms) or, more recently, somewhere in the middle (mesotherms). But new research looking at the chemistry of dinosaur eggshells reveals that these monsters of the Triassic and Cretaceous periods were warm-blooded (endotherms) creatures. Host Stefan Chin gives us more in this presentation from SciShow.
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There is a group of animals with more species than any other group, but Earth has such an astonishing variety of life that figuring out which group dominates is tricky. Host Stefan Chin attempts to unravel the puzzle in this episode of SciShow.
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