常速英语

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We're going to have a look at the way in which an amputated limb grows over the course of about 90 days in a salamander. That's a time-lapse movie， watching that thing grow. And now we're ...

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Planet Earth is the home of every lifeform, known to us, in the universe. Its age is about 1/3 of the age of the universe and, admitted, It is a thing of beauty. a slightly squashed fai...

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So during the Ice Age, these huge sheets covering lots of land mass. Ice was incredibly thick, so mile-wide thicknesses of ice piled on top of land. And then the Earth starts to warm. ...

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Every second of your life, you are under attack. Billions of bacteria, viruses, and fungi are trying to make you their home, so our bodies have developed a super complex little army with guards,...

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Dogs vary in all sorts of interesting traits, colors, hair textures, sizes, behaviors that are interesting and useful to humans. DNA studies suggest that all those different modern dog ...

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Are you alone in the universe? Or are you connected to anything? First of all, you’re part of a group of mammals that’s still very young, but we can make videos already, and build Large ...

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These are all based on studies of a fossil lake site in Nevada. At this site, diatoms die each year, float to the bottom of the lake, and establish these thin rocky layers that are lik...

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Time makes sense in small pieces. But when you look at huge stretches of time, it’s almost impossible to wrap your head around things. So let’s start small with minutes, hours, days. ...