UC Berkeley
Image Caption
If evolution happens in "quick" jumps, we'd expect to see big changes happen quickly in the fossil record, with little transition between ancestor and descendent. Here, the descendent preserved in a layer directly after the ancestor, showing a big change in a short time, with no transitional forms.
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This image is part of a series:
Pace of evolution (1 of 3) Slow and steady
The preservation of many transitional forms, through layers representing a length of time, gives a complete record of slow and steady evolution.