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Did you know that you would be a different age if you lived on Mars? It's true!

In this activity, learners explore the concept of how engineering solved the problem of human/computer interface.

This activity shows how our experience of the Sun changes with time and location. The sun dagger at Chaco Canyon is thought by many to be a sort of ancient timekeeping device.

In this activity, learners design and build a simple wind vane —one of the oldest kinds of weather tools— and use it to show wind direction.