04:41 Social Studies What is a butt tuba and why is it in medieval art? Lesson duration 04:41 941,805 Views
05:28 Science & Technology Turbulence: one of the great unsolved mysteries of physics Lesson duration 05:28 1,402,792 Views
05:11 Science & Technology The wild world of carnivorous plants Lesson duration 05:11 2,352,388 Views
10:02 Literature & Language 4 reasons to learn a new language - John McWhorter Lesson duration 10:02 2,274,713 Views
04:33 Environmental Science What's the difference between weather and climate? Lesson duration 04:33 3,954,141 Views
04:47 Science & Technology Using radioactive drugs to see inside your body Lesson duration 04:47 391,542 Views
02:02 Science & Technology Is it better to walk or run in the rain? Lesson duration 02:02 21,362,020 Views
