05:31 Engineering Why don't perpetual motion machines ever work? Lesson duration 05:31 16,705,892 Views
04:08 Earth and Space Science How small are we in the scale of the universe? Lesson duration 04:08 1,115,992 Views
04:47 Physical Science Is there a limit to technological progress? Lesson duration 04:47 763,621 Views
04:45 Science & Technology Why doesn’t anything stick to Teflon? Lesson duration 04:45 3,101,108 Views
04:46 Science & Technology Is there a reproducibility crisis in science? Lesson duration 04:46 446,295 Views
06:25 Earth and Space Science Carl Sagan on the Existence of Extraterrestrials Lesson duration 06:25 656,246 Views
07:13 Earth and Space Science What if everyone jumped at once? Lesson duration 07:13 40,118,890 Views
06:17 Earth and Space Science Three Ways to Destroy the Universe Lesson duration 06:17 27,624,949 Views
04:24 Physical Science How do we separate the seemingly inseparable? Lesson duration 04:24 764,486 Views
11:44 Design, Engineering & Technology The World's Roundest Object (and Why it Exists) Lesson duration 11:44 38,181,089 Views