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1 trillion tonnes
Contents:
  1. NASA to build telescope for detecting asteroids that threaten Earth
  2. Half-Earth Project | E.O. Wilson Biodiversity Foundation
  3. More from News

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NASA to build telescope for detecting asteroids that threaten Earth

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And we could be the last that can do anything about it. They found helium atoms missing a neutron—a sure sign of being shot out of the Sun—as well as rare metals often found in asteroids.

Half-Earth Project | E.O. Wilson Biodiversity Foundation

In short, the dust from the asteroid was enriched with helium after being bombarded by the solar wind on its way to Earth. These are cliffs made of sedimentary rock that was once an ancient seabed.

The gray horizontal line in the rock shows where the dust from the asteroid collision fell. However, the unexpected discovery could be relevant for tackling global warming if carbon dioxide emissions are not reduced.

More from News

So could we replicate the dust shower that triggered global cooling million years ago? It may be possible to place asteroids in orbits around Earth in such a way that they continuously shed dust and partially block sunlight from reaching Earth.


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Heck thinks such a scheme would be very risky. However, this knowledge could be useful.

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I'm an experienced science, technology and travel journalist interested in space exploration, moon-gazing, exploring the night sky, solar and lunar eclipses, astro-trave Share to facebook Share to twitter Share to linkedin. Jamie Carter. Read More.

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