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02:39 The Arts Why babies in medieval paintings look like ugly old men Lesson duration 02:39 7,698,856 Views
05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 16,775,551 Views
01:40 History How the bendy straw was invented | Moments of Vision 12 Lesson duration 01:40 424,350 Views
04:33 History Who were the Vestal Virgins, and what was their job? Lesson duration 04:33 9,924,754 Views
13:57 Health What you can do to prevent Alzheimer's | Lisa Genova Lesson duration 13:57 3,279,475 Views
05:30 Environmental Science Meet The Frog That Barfs Up Its Babies Lesson duration 05:30 2,078,755 Views
05:07 Data Analysis & Probability Check your intuition: The birthday problem Lesson duration 05:07 2,823,154 Views
01:51 Social Studies How the popsicle was invented | Moments of Vision 11 Lesson duration 01:51 460,398 Views
