1
Published in 2016
"This video clip is about mass extinctions. In the late 1970s, a scientist by the name of Jack Sepkoski embarked on the most ambitious fossil hunt ever. He created a chart that shows what is today called """"The Big Five Mass Extinctions."""" The chart is still used today by paleontologists, but is...
Grade Level   3 4 5 6 7 8 9 10 11 12
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2
Published in 2015
Watch MinuteEarth explain how plate tectonics really work.
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