Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter @sciencef1rst.
These tiny glass beads were created by the intense heat and pressure generated by meteor strikes. This means researchers can reconstruct a timeline of lunar bombardment by assessing the ages of these beads.impacts on the moon were mirrored by space rock strikes on Earth, meaning the timeline the team built could also provide insight into the evolution of our planet.
"We combined a wide range of microscopic analytical techniques, numerical modeling and geological surveys to determine how these microscopic glass beads from the moon were formed and when," lead study author Alexander Nemchin, a professor at SSTC, said in a statement. The ages of some of the lunar glass beads indicated they were created around 66 million years ago, around the time the, known as the Chicxulub impactor, struck Earth in what is now the Gulf of Mexico, near Mexico's Yucatán Peninsula.
The impact led to what is known as the Cretaceous-Paleogene extinction event, which ultimately killed three-quarters of all life on Earth, including the nonavian dinosaurs. The roughly 6.2-mile-wide Chicxulub impactor struck Earth at around 12 miles per second , or 43,200 mph , leaving an impact crater measuring about 93 miles wide and 12 miles deep.
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Evidence of dinosaur-killing asteroid impact found on the moonRobert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter sciencef1rst.
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