The simplest way to define evolution takes just three words: change through time. Life has a
long history, and it has changed throughout that history, resulting in the
biodiversity that we see today.
Imagine for a moment that you have a lens through which you can view the oceans across
geologic
time. What would you expect to see? Which organisms would be the same as today? Which would be different?
Click the three lenses below for a peek at life in the
sea through time.
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