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05:54 Science & Technology Why no aquarium has a great white shark Lesson duration 05:54 32,755,020 Views
03:48 Linguistics One of the most difficult words to translate... Lesson duration 03:48 2,018,713 Views
06:50 Thinking & Learning What you don't know about who you will become Lesson duration 06:50 901,168 Views
04:39 Geometry How the Königsberg bridge problem changed mathematics Lesson duration 04:39 1,463,639 Views
10:09 Global Economics Why can't we just print money to pay off debt? Lesson duration 10:09 4,195,964 Views
04:32 Health Our natural sleep cycle is nothing like what we do now Lesson duration 04:32 600,318 Views
04:09 Environmental Science Are spotty fruits and vegetables safe to eat? Lesson duration 04:09 814,650 Views
