Earth flying through ancient supernovae's dust

Earth flying through ancient supernovae's dust

Scientists say space has been seeding Earth for last 33,000 years with rare iron isotope formed in supernovae

By Havva Kara Aydin

ANKARA (AA) - The Earth has been passing through a huge radioactive cloud left behind by an exploded star for the last 33,000 years, according to a research.

The research, published in Proceedings of the National Academy of Sciences, claimed that beneath the ocean waves, radioactive dust shows that Earth has been moving through a huge cloud left by an exploded star.

It was underlined that the Earth has been seeded continuously by space with a rare iron isotope formed in the supernovae for the last 33,000 years.

The isotope, known as iron-60, has a half-life of 2.6 million years, meaning it completely decays after 15 million years. It was suggested that it is impossible for any iron-60 to survive after the formation of the planet 4.6 billion years ago and the dust must be coming from elsewhere.

The research also pointed out that iron-60 was found in the Antarctic snow and in the space around Earth which had fallen in the last 20 years. It was measured over a 17-year period.


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