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04:18 Life Sciences The physics of human sperm vs. the physics of the sperm whale Lesson duration 04:18 Manage Library 4,370,909 Views
05:58 Science & Technology Light waves, visible and invisible Lesson duration 05:58 Manage Library 1,037,470 Views
04:10 Life Sciences Bird migration, a perilous journey Lesson duration 04:10 Manage Library 253,982 Views
04:08 History Urbanization and the evolution of cities across 10,000 years Lesson duration 04:08 Manage Library 2,633,395 Views
03:47 Numbers & Operations A trip through space to calculate distance Lesson duration 03:47 Manage Library 154,802 Views
02:46 Life Sciences Cicadas: The dormant army beneath your feet Lesson duration 02:46 Manage Library 483,657 Views
04:13 History Why do Americans and Canadians celebrate Labor Day? Lesson duration 04:13 Manage Library 590,118 Views
03:45 Earth and Space Science Four ways to understand the Earth's age Lesson duration 03:45 Manage Library 680,981 Views
03:55 Psychology What is déjà vu? What is déjà vu? Lesson duration 03:55 Manage Library 4,997,794 Views
03:19 Physical Science The Higgs Field, explained Lesson duration 03:19 Manage Library 1,019,049 Views
04:46 Earth and Space Science Gravity and the human body Lesson duration 04:46 Manage Library 445,516 Views
01:55 Linguistics Mysteries of vernacular: Bewilder Lesson duration 01:55 Manage Library 60,134 Views
04:23 Motivation and Emotion Overcoming obstacles Lesson duration 04:23 Manage Library 1,103,068 Views
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04:25 Earth and Space Science The Arctic vs. the Antarctic Lesson duration 04:25 Manage Library 4,609,591 Views
03:15 Physical Science The science of macaroni salad: What's in a molecule? Lesson duration 03:15 Manage Library 310,547 Views
