A rare primordial gas could escape from the Earth’s core

An extremely rare type of helium that was created shortly after the Big Bang is escaping from Earth’s metallic core, according to a new modeling study.

The vast majority of this gas in the universe, called helium-3, is primordial and was created right after the big Bang occurred about 13.8 billion years ago. Some of this helium-3 would have joined other particles of gas and dust in the solar nebula – the large, spinning, collapsing cloud that would have led to the creation of the solar system.

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