1. In what location are the sense organs in humans that allow them to sense gravity? 2. Speculate on how the vestibular system might be involved in “space sickness”—the feeling of nausea and...

1. In what location are the sense organs in humans that allow them to sense gravity?

2. Speculate on how the vestibular system might be involved in “space sickness”—the feeling of nausea and disorientation that astronauts experience.

3. Why doesn’t the Leaning Tower of Pisa topple?