Credits

All content under the Creative Commons CC-BY-SA 4.0 license if not stated otherwise.

TED talks are available for free under a Creative Commons BY-NC-ND license. TED name and logo are registered trademarks of TED.com.

PhET under CC-BY PhET Interactive Simulations, University of Colorado Boulder. PhET® is a registered trademark owned by the Regents of the University of Colorado, a body corporate, and is being used under license.  The University is not affiliated with and does not endorse Kiwix or any of its sponsors.

Author credits:

Felix Nartey
Michał Komorniczak
José Porras (2)
Christopher Crouzet
Matthew Hadley
Simon Goodall (2)
Tormod Sandtorv
Gcote82
Victor Grigas
Rama
Taipei Medical University FLYoung International Service
Zachary McCune
A. Kauffeld from USAID (public domain)
North Korea photo © Jung Kwang-Il,  courtesy of NKSC
Homepage key visual by StockSnap (CC0 license)