Evidence of supernova found in fossil remnants
Washington: Researchers of the Cluster of Excellence Origin and Structure of the Universe at the Technische Universitaet Muenchen (TUM), found a radioactive iron isotope in fossil remnants of iron-loving bacteria, which 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 must have occurred about 2.2 million years ago, roughly around the time when the modern human developed.
Most of the chemical elements have their origin in core collapse supernovae. When a star ends its life in a gigantic starburst, it throws most of its mass into space. The radioactive iron isotope Fe-60 is produced almost exclusively in such supernovae.
Because its half-life of 2.62 million years is short compared to the age of our solar system, no supernova iron should be present on Earth. Therefore, any discovery of Fe-60 on Earth would indicate a supernova in our cosmic neighborhood.
In the year 2004 scientists at TU Muenchen discovered Fe-60 on Earth for the first time in a ferromanganese crust obtained from the floor of the equatorial Pacific Ocean. Its geological dating puts the event around 2.2 million years ago.
More from India
More from World
More from Sports
More from Entertaiment
- Highlights - India vs England 2nd ODI in Cuttack
- Missed the dance of American President Donald Trump? - Watch it here
- DNA: Manish Sisodia faces CBI probe over alleged irregularities in 'Talk To AK' programme
- Pawan, a BE student develops smart dustbin -Watch
- Donald Trump to be sworn in as 45th US President today
- WATCH: MS Dhoni asks Jasprit Bumrah to go easy after he hurriedly ran out England skipper Eoin Morgan
- Accused of Muslim-bias on visa applications, Sushma Swaraj hits back
- WATCH: How MS Dhoni saved Yuvraj Singh's wicket with another successful DRS review
- Cuttack ODI: Umpire Kumar Dharmasena messes up DRS review, twitter couldn't stop trolling
- India vs England: After Virender Sehwag, Sachin Tendulkar gives Piers Morgan cricketing gyan