The Manhattan-sized asteroid that hit the Earth 65.5 million years ago, released a billion times more energy than the Hiroshima atomic bomb, triggered dust and ash storms, wildfires, tsunamis, earthquakes, and a “nuclear winter”. It is widely believed to have caused the K-T boundary extinction and demise of the dinosaurs. This event has also been linked to the subsequent proliferation of mammals on the planet. New evidence from North Dakota however, shows networks of crisscrossing worm burrows less than three inches above the K-T boundary layer, meaning they were made within a few thousand years after the extinction event. It is hoped that future research will be able to narrow this period down. Scientists at the University of Colorado believe the burrows were made in a bog-like environment that was eventually buried by sediment. These trace fossils show the worms were one of the earliest creatures to emerge from the devastation and must have been able to withstand the environmental stresses of flooding, including prolonged inundation, low oxygen, and acidic conditions.
Posted by Astrojenny
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1 comments:
Amazing how rubust life can be!
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