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Laser cloaking device could help us hide from aliens

Two astronomers at Columbia University in New York suggest humanity could use lasers to conceal the Earth from searches by advanced extraterrestrial civilisations. Professor David Kipping and graduate student Alex Teachey ...

dateMar 31, 2016 in Astronomy
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Explainer: What is microgravity?

It's easy to assume that astronauts float in space because they are far away from the Earth's gravitational force. But look at the moon. It is much further away than the International Space Station, yet it orbits around the ...

dateApr 27, 2016 in Space Exploration
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