Science Building a fire in a cave is not easy — early humans figured out how 4:40pm February 04, 2022 Research News Science History Share URL copied to clipboard! Copyright 2022 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered National All eyes on special congressional elections in Florida Tuesday by Greg Allen Arts As their car started rolling down hill, a stranger rushed in to help 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate
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