Fossilized footprints, preserved in gypsum mud that hardened over time, are estimated to be 23,000-21,000 years old. NPS / Alamy Ancient human footprints, preserved in a dry lakebed at White Sands ...
There is a long-standing debate in the field of music cognition about the impact of musical training and whether formal ...
The genre of science fiction has a lot to say about sleep. Here are 11 great stories, from TV, film and books.
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