Main content
Are humans the only animals to exercise?
Many humans spend hours in the gym and going on runs - but are we the only animals to exercise intentionally? Ecophysiologist Shaun Killen explains why it's so hard to know whether animals work out.
Photo: A montage picture of a mouse lifting weights Photo: Getty Images
Duration:
This clip is from
More clips from CrowdScience
-
![]()
What would happen if we fell straight through the earth?
Duration: 02:34
-
![]()
Why is aurora green?
Duration: 02:19
-
![]()
In a random universe, is anything predictable?
Duration: 01:58
-
![]()
How do birds survive so high up?
Duration: 02:13
