Remnants of a similar supernova explosion in the constellation Cassiopeia, about 11,000 light-years away. (Credit: NASA/JPL-Caltech/STScI/CXC/SAO)
Researchers at the Technical University of Munich have found a radioactive iron isotope in bacteria microfossils.that they trace back to a supernova in our cosmic neighborhood.
This is the first proven biological signature of a starburst on our earth. The age determination of the deep-drill core from the Pacific Ocean showed that the supernova explosion must have occurred about 2.2 million years ago, roughly around the time when the modern human developed.
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