Perpetual Motion Machine

We know from Science that perpetual machine is impossible. But think again.


Obviously this is not a single instance. Here is another example.


So is Science wrong?
If you want to make one, here is how.

The power of stepping into the shoes of others

If this 18-minute talk has changed your point of view, imagine what a 3-week playing the role of your enemy would enable you to understand. Imagine the transformative effect of your course to your students if you allow your students to experience stepping into the shoes of others. That's the power of online role playing. If you want to try, I am ready to help you.

Big History