04:35 Thinking & Learning Can you solve the prisoner hat riddle? Lesson duration 04:35 31,551,331 Views
04:59 Design, Engineering & Technology How do solar panels work? Lesson duration 04:59 26,005,507 Views
03:50 Design, Engineering & Technology Can you solve the bridge riddle? Lesson duration 03:50 22,894,813 Views
05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 16,836,842 Views
04:42 Philosophy & Religion Can you solve the famously difficult green-eyed logic puzzle? Lesson duration 04:42 15,843,854 Views
04:49 Cognition and Learning How to practice effectively...for just about anything Lesson duration 04:49 14,191,820 Views
