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1:11 Planetary science
Why Venus Is Hotter Than Mercury
0:53 Timekeeping
The Year 1582 Lost Ten Days
0:48 Electricity
Why Birds on Power Lines Don't Get Shocked
1:03 Logistics
The steel box that shrank the world
1:06 Etymology
OK started as a joke
0:51 Evolutionary biology
Goosebumps Are Left Over from Fur
0:50 Geochemistry
Why the Sea Is Salty but Rivers Are Not
0:55 Ornithology