What if the Earth were hollow?

Imagine that we dig a tunnel going from one side of our planet to the other side. What would happen with the body falling through that tunnel? Or what if the Earth were shell, with empty space inside. Would there be a gravity? Answers to those questions find in this video...

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Why are astronauts weightless in Space?

It would be hard to find a person who haven't saw on TV how astronauts float inside International Space Station orbiting around Earth. On question why is it so, answer would be "because they are weightless". But why are they weighless? The most common answer is "there is no gravity in space!". We bring you short video in which you can find right answer on this question...

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Hyper Earth: the New World in 4k

Our world, Earth, is changing before our eyes. Take a look on new HD images of Earth and watch how it changes. Incredible 4k supercomputer images of Earth brought to you on video...

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