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0:50 Geochemistry
Why the Sea Is Salty but Rivers Are Not
0:55 Ornithology
Why Geese Fly in a V
0:51 Biochemistry
Why Onions Make You Cry
1:09 Agriculture
Every banana you buy is a clone
0:49 Anthropology
Can You Really Keep Up With 150 People?
0:45 Celestial mechanics
Why Earth Has Two High Tides
0:54 Algorithms
Find One in a Million in 20 Guesses
0:58 Spaceflight