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03:47 Physical Fitness How playing sports benefits your body ... and your brain Lesson duration 03:47 2,569,201 Views
06:25 Earth and Space Science Carl Sagan on the Existence of Extraterrestrials Lesson duration 06:25 658,950 Views
05:06 Medical Conditions Is there a disease that makes us love cats? Lesson duration 05:06 1,910,249 Views
05:04 Literature & Language What makes something "Kafkaesque"? Lesson duration 05:04 13,292,659 Views
04:12 Design, Engineering & Technology How to fly around the world without fuel Lesson duration 04:12 40,485 Views
03:51 Design, Engineering & Technology It's not you. Claw machines are rigged. Lesson duration 03:51 10,017,877 Views
07:13 Earth and Space Science What if everyone jumped at once? Lesson duration 07:13 40,174,875 Views
04:33 History Why wasn’t the Bill of Rights originally in the US Constitution? Lesson duration 04:33 985,764 Views
