The Chicxulub asteroid – which caused the extinction of dinosaurs – spurred a long era of global warming when it struck the earth 65 million years ago with a rapid rise in temperature of 5 degrees Celsius, lasting about 100,000 years. A study has found
The monumental event is a rare case in which the systems of the earth were disturbed at a greater speed than that which now emanates from human activity.
It provides valuable insights into what can happen through sudden, extreme environmental changes.
The aftermath of the Chicxulub strike continues to be controversial, and some scientists advocate that soot in the atmosphere blocks the sun sufficiently to drive global cooling
Others suggest that carbon from the earth's crust into the atmosphere impacts the impact of the asteroid and carbon from forest fires had a warming effect.
To better understand how temperature changes during this time, researchers from the University of Missouri and the University of Colorado Boulder in the US analyzed a robust collection of well-preserved, grain-sized remnants of fangs, scales, and bones from a location in Tunisia.
These samples retain oxygen isotopes on signatures that reveal the temperature at the time the related animal was alive.
The researchers were able to collect samples from sediments that extended over time (u) (1
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