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Science & Technology
¿Por qué el hielo flota en el agua? - George Zaidan y Charles Morton
Lesson duration 03:57
Design, Engineering & Technology
Want to survive a hurricane? Think like a tree...
Lesson duration 01:32
Science & Technology
Neil deGrasse Tyson on Surviving in Space without a Spacesuit
Lesson duration 03:05
Business & Economics
¿Qué le da el valor a un billete de dólar? - Doug Levinson
Lesson duration 03:52