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Science & Technology
Nature's fortress: How cacti keep water in and predators out
Lesson duration 04:20
Literature & Language
The Norse myth that inspired “The Lord of the Rings”
Lesson duration 05:25
Design, Engineering & Technology
The surprisingly long history of electric cars
Lesson duration 05:20
Science & Technology
The genes you don't get from your parents (but can't live without)
Lesson duration 05:03