04:59 Design, Engineering & Technology Why are airplanes slower than they used to be? lesson duration 04:59
05:10 Business & Economics Why good ideas get trapped in the valley of death— and how to rescue them lesson duration 05:10
06:17 Science & Technology What it's like to live on the International Space Station - Cady Coleman lesson duration 06:17
05:10 Science & Technology The incredible, bendable, twistable, expandable elephant trunk lesson duration 05:10
05:02 Science & Technology How much electricity does it take to power the world? lesson duration 05:02
05:27 Science & Technology The material that could change the world... for a third time lesson duration 05:27