"In 1985, when Americans were asked how many close friends they had, the most common answer was "three". In 2004, the most common answer was "zero". We now have fewer friends across class, racial, economic, and political lines, because we have fewer friends -- period. And as you just discovered for yourself, the fewer "repeat interactions" there are, the more distrust will spread."

- part of a teaching aproach through game theory about trust.

Play and learn:


: Neil deGrasse Tyson How to
Physics and science play a huge part in everything around us.–and pop culture is a great way to frame new information.

A Just Taught Another Robot How to

recently made an in . They’ve achieved learning by a to another bot how to . But in a twist, they ended up with an that is to at .