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Video: Introduction to Evolution and Natural Selection
Khanacademy Organización
- 5120 visitas
This 17 minute video introduces the basics of Darwin Theory in plain English, especially how the ape evolved into human beings. Natural Selection means the survival of the aptest. There are always…
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Video: The truthteller and the liar brain teaser
Khanacademy Organización
- 3613 visitas
This 7 minute tutorial explains how to go through a simple brain teaser. The problem we are asked to solve is this: choosing one of two doors to get a treasure which is behind. There are 2 guardians who…