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Archive for the tag “Stefan Chin”

Why Bats Carry Many Diseases

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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Dinos Weren’t Cold-Blooded

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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What Animal Dominates Earth?

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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