05:54 Science & Technology Why no aquarium has a great white shark Lesson duration 05:54 32,763,762 Views
03:48 Linguistics One of the most difficult words to translate... Lesson duration 03:48 2,019,610 Views
06:50 Thinking & Learning What you don't know about who you will become Lesson duration 06:50 909,018 Views
04:39 Geometry How the Königsberg bridge problem changed mathematics Lesson duration 04:39 1,467,523 Views
10:09 Global Economics Why can't we just print money to pay off debt? Lesson duration 10:09 4,196,716 Views
04:32 Health Our natural sleep cycle is nothing like what we do now Lesson duration 04:32 600,531 Views
04:09 Environmental Science Are spotty fruits and vegetables safe to eat? Lesson duration 04:09 816,125 Views
