常速英语

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When two black holes slam together, they don't make a sound. And yet this is what we hear if we listen closely, Let’s listen again That “chirp” is what we heard from two black holes ...

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You are not a person, you are a planet, made of roughly 40 trillion cells. There is so much of you, that if your cells were human-sized, you would be as big as 20 Mount Everests. For you...

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[SHUBIN:] Tiktaalik was headline news the day it was described in 2006. And I remember going in to drop one of my kids off at school. And the teacher asked me, "You know, I read about y...

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What if one day you turned on the news channel to see this... Breaking news... ...volcanic eruption... ...already caused 2 million casualties... ...all airports are closed... If all th...

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Never before in human history have we been richer, more advanced or powerful. And yet we feel overwhelmed in the face of rapid climate change. It seems simple on the surface. Greenhouse gas...

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Johanna Teske: Ok, this is a spectrum. Teske: Vera Rubin means a lot to a lot of astronomers. This was one of the instruments that she used to help discover the presence of dark matter, which we no...

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[ Music ] [Background music] It was definitely the biggest adventure of my life. [ Music ] This was the Canadian Arctic. Hundreds of miles away from any settlement. We had a narro...

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Wake up! Are you late again? Sometimes we wish we never had to deal with this morning struggle... But what if you just never went to bed? What if you figured out how to keep yourself awa...