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00:07:00

The Doppler Effect – some examples

by Harry Churchill | Highschool presentations | 14-19 and upwards | 11 years ago | 3023 views More details Watch now
01:10:00

The last 2 million years of human evolution

by Chriisitpher Stringer | Lectures | 18-22 and upwards | 15 years ago | 2665 views More details Watch now