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For example, sharks and alligators have remained relatively unchanged for millions of years.

A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf. A green leaf.
Butterfly 1 - Stationary
Butterfly 2 - Stationary
Butterfly 2 - Stationary
Butterfly 3 - Stationary