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Learn · The 55 gigaton challenge

Talk6 min

The 55 gigaton challenge

Countdown · TED

At TED

Credits and licence

From
The 55 gigaton challenge, TED (at TED)
Licence
CC BY-NC-ND 4.0, as TED states it. Non-commercial use only, and no changed versions.
Attribution
TED Talks are licensed by TED under Creative Commons BY-NC-ND 4.0 International and are shown here in TED's own player, as TED's usage policy asks.
Who can watch
Tweens profiles and older. How courses are placed