This 9-minute video explains the cyclical phenomena at work in the universe. Learn about the subtle changes in the sky as the Earth circles the sun, following along the ecliptic. Learn how the tilt of the Earth's axis has a profound effect on the planet by creating the seasons.
Why do some animals hibernate? The Arctic Ground Squirrel burrows under the permafrost and slips into a state of suspended animation. The fat-tailed dwarf lemur stores its fat reserves in its tail - doubling its body weight.