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Science & Technology
Nature's fortress: How cacti keep water in and predators out
Lesson duration 04:20
Science & Technology
Just add water: The garden insect that can turn into a plague
Lesson duration 05:46
Design, Engineering & Technology
The surprisingly long history of electric cars
Lesson duration 05:20
Science & Technology
What it's like to live on the International Space Station - Cady Coleman
Lesson duration 06:17
Science & Technology
The incredible, bendable, twistable, expandable elephant trunk
Lesson duration 05:10