LogFAQs > #888231710

Microevolution exists and it's hard to find people willing to refute that. It's evolution on an individual level in a short timeframe. It is observable from single celled organisms to larger creatures.

Macroevolution (or evolution as many people think of it) is the longer scale aggregate of microevolution and environmental influence such as large environmental changes. You're looking at changes over geological timeframes rather than a handful of generations. Speciation occurs.

If microevolution exists, over enough time macroevolution must exist. You just can't live long enough to witness the occurrence. That's where we have to turn to fossil records or specimens preserved in other ways, and where DNA can be helpful when it's possible to compare.
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