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Science & Technology
The incredible, bendable, twistable, expandable elephant trunk
lesson duration 05:10
Design, Engineering & Technology
How one design flaw almost toppled a skyscraper
lesson duration 05:16
Social Studies
Debunking the myth of the Lost Cause: A lie embedded in American history
lesson duration 04:43
Design, Engineering & Technology
Why are airplanes slower than they used to be?
lesson duration 04:59