05:54 Science & Technology Why no aquarium has a great white shark Lesson duration 05:54 32,741,310 Views
03:48 Linguistics One of the most difficult words to translate... Lesson duration 03:48 2,017,237 Views
06:50 Thinking & Learning What you don't know about who you will become Lesson duration 06:50 890,398 Views
04:39 Geometry How the Königsberg bridge problem changed mathematics Lesson duration 04:39 1,456,139 Views
10:09 Global Economics Why can't we just print money to pay off debt? Lesson duration 10:09 4,194,466 Views
04:32 Health Our natural sleep cycle is nothing like what we do now Lesson duration 04:32 599,842 Views
04:09 Environmental Science Are spotty fruits and vegetables safe to eat? Lesson duration 04:09 811,229 Views
