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05:54 Science & Technology Why no aquarium has a great white shark Lesson duration 05:54 32,129,324 Views
03:48 Linguistics One of the most difficult words to translate... Lesson duration 03:48 2,008,998 Views
06:50 Thinking & Learning What you don't know about who you will become Lesson duration 06:50 834,313 Views
04:39 Geometry How the Königsberg bridge problem changed mathematics Lesson duration 04:39 1,409,974 Views
10:09 Global Economics Why can't we just print money to pay off debt? Lesson duration 10:09 4,184,265 Views
04:32 Health Our natural sleep cycle is nothing like what we do now Lesson duration 04:32 596,020 Views
04:09 Environmental Science Are spotty fruits and vegetables safe to eat? Lesson duration 04:09 792,229 Views
12:21 Psychology How to stay calm when you know you'll be stressed Lesson duration 12:21 17,944,712 Views
03:02 Science & Technology Could You Survive 2.5 Million Years Ago? Lesson duration 03:02 2,749,103 Views
04:14 Earth and Space Science How a single-celled organism almost wiped out life on Earth Lesson duration 04:14 2,710,698 Views
12:47 Psychology What makes a good life? Lessons from the longest study on happiness Lesson duration 12:47 27,043,713 Views