- Glass balls can bounce higher than rubber ones.
- Along with arithmetic, geometry was one of the two fields of pre-modern mathematics.
- Goats have rectangular pupils in their eyes.
- Sharks lose teeth a lot when they eat. Some sharks will replace as many as 25,000 teeth in a lifetime.
- It takes around 200 muscles to take a step.
- Are you terrified that a duck is watching you? Some people are. That is anatidaephobia.
- Money is the number one thing that couples argue about.
- A species of moth has the best hearing in the world.
- The humming bird is the only bird that can fly backwards.
- Some bears build nests in trees to sunbathe and rest.
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