What Killed the Dinosaurs Drove the Kangaroo's Cousin to Extinction
It's said that the extinction event was a turning point for mammals, allowing us to thrive and evolve. But this cataclysmic event wasn't a boon for every mammal.
Natalie has been writing professionally for about 6 years. After graduating from Ithaca College with a degree in Feature Writing, she snagged a job at PCMag.com where she had the opportunity to review all the latest consumer gadgets. Since then she has become a writer for hire, freelancing for various websites. In her spare time, you may find her riding her motorcycle, reading YA novels, hiking, or playing video games. Follow her on Twitter: @nat_schumaker
The theories behind the demise of the dinosaurs is well-known. Death by asteroid is one of the more popular possibilities, but volcanic eruptions may have had a part to play. Regardless, these reptilian giants died-out--food became scarce and temperatures dropped, allowing our, smaller furry mammalian ancestors to have their time in the sun. But Eric Mark of Forbes explains that our species could have been wiped out just as easily, according to a recent study.
“The classic tale is that dinosaurs died out and mammals, which had been waiting in the wings for over 100 million years, then finally had their chance. But our study shows that many mammals came perilously close to extinction. If a few lucky species didn’t make it through, then mammals may have gone the way of the dinosaurs and we wouldn’t be here.”
The disruption of the dinosaurs allowed mammals a unique opportunity at the end of the Cretaceous period to survive and thrive as they hadn't before. However, metatherian mammals (animals with pouches) suffered great losses after the cataclysmic event. From fossil records in America's Great Plains, researchers found that diversity among the species dropped significantly after the event and an estimated two-thirds of them died out in North America alone. The study explained that this loss may explain why marsupials can only be found in unique places, such as Australia and South America.
This extinction event for the kangaroo's and opossum's cousin allowed placental mammals (mice, humans, dolphins) to evolve and thrive into the Paleogene period and beyond.
Read more at Forbes
Photo Credit: Marie Hale/Flickr
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