Sauropod dinosaurs grew to 25 metres or more in length and weighed several tonnes – but footprints in Texas seem to suggest they sometimes walked on just two legs Source: Dinosaur tracks seem to show giant sauropods wading on two front legs
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https://www.newscientist.com/article/2231453-new-coronavirus-may-be-much-more-contagious-than-initially-thought/
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