来吗?The earth is a very special planet, and it faces a big problem.地球是一个很特别的行星, 但它面临着一In the year 2010, the world's population was over 7 billion in个大问题。2010年,据统计世界的人口总数total. It is increasing very quickly. ① By 2025, the world may超过了70亿。
“A nebula is bigger than a star because it has stars in it. But, I wasn’t sure exactly how much bigger. So I did the math, and the answer is… yeah, it’s quite a lot bigger. I can give you the numbers, but numbers are hard to picture.” So, he created this amazing video...
"From students to CEOs,How to Save Our Planethas something for everyone when it comes to the fight to save our planet. From the big bang to the future of our fast-warming world, Mark takes us at breakneck speed through the ways humanity is shaping the planet, and presents with amazing ...
The sun and the moon are about the same size when you look at them in the sky, though that’s just thanks to the coincidence that the sun is about 400 times farther away than the moon and also about 400 times bigger. Another fun coincidence is that the radius of the sun is about t...
Earth to scale: It’s easy to forget how small our Earth is within the known universe. These to-scale visuals will help to keep that in perspective. Earth to scale Some excerpts from the video: As a person living on Earth, our planet feels pretty big. But, if you start to think ...
How volcanoes shaped our planet — and why we need to be ready for the next big eruptionVolcanologyGeologyGeophysicsSolid Earth sciencesThe world should learn from past disasters and prepare for the effects of future, inevitable volcanic catastrophes, a wide-reaching book teaches us.#The world ...
16. New Delhi from a bird’s eye. Over 22 million inhabitants. We are in big, big trouble. 17. Maldives is threatened by rising sea levels. 18. Tech junk that’s never going to biodegrade. #SorryMotherEarth! 19. Land gone bald a.k.a. deforestation. ...
Quite big actually, our moon is the biggest in the solar system in relation to its planet,实际上非常大 在太阳系里 月球是和其行星相比 已经算是最大的卫星了and it’s the fifth largest moon in the solar system.我们的月球是整个太阳系里第五大的卫...
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This artist’s rendering shows a view of our own Milky Way Galaxy and its central bar as it might appear if viewed from above. Credit: NASA/JPL-Caltech/R. Hurt (SSC) When we talk about the enormity of the cosmos, it’s easy to toss out big numbers – but far more difficult to...