Supernova left its mark in ancient bacteria

[Waspie_Dwarf]

Supernova left its mark in ancient bacteria

Radioactive iron may be first fossil imprint of a nearby cosmic explosion.

Sediment in a deep-sea core may hold radioactive iron spewed by a distant supernova 2.2 million years ago and preserved in the fossilized remains of iron-loving bacteria. If confirmed, the iron traces would be the first biological signature of a specific exploding star.

Shawn Bishop, a physicist at the Technical University of Munich in Germany, reported preliminary findings on 14 April at a meeting of the American Physical Society in Denver, Colorado.

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[Zeta Reticulum]

So how did crocs and sharks and anything that was on land survive this ?

[Waspie_Dwarf]

So how did crocs and sharks and anything that was on land survive this ?

With the greatest of ease. This wasn't an extinction event. Nothing died as a result, it just that some of the material from the supernova found its way to Earth.

[Zeta Reticulum]

So if Betelgeuse goes super nova, we have nothing to worry about ?

[Waspie_Dwarf]

So if Betelgeuse goes super nova, we have nothing to worry about ?

Nope.

A supernova within about 30 light years of Earth could potentially wipe at most or all life here, but Betelguese is 643 ± 146 light years from Earth.

[Frank Merton]

It would be a show though

[Waspie_Dwarf]

It would be a show though

Oh yes!