A rock the size of a semitrailer that smacked Australia more than 100,000 years ago could help us better understand the universe. Astronomers just recalculated the age of an ancient desert crater and discovered that it's much younger than previously thought. By studying craters on Earth, we can better estimate how often comets and meteorites smacked into worlds around our solar system, thereby calculating their ages — and based on this work, we may have to rethink everything we know.
Younger Than It Looks
Written by Elizabeth Howell December 20, 2019
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