Not so
She's only the most recent *matrilineal* common ancestor of us all. Y-Chromosomal Adam lived much more recently -- probably 70,000 years ago or so, and he's the most common patrilineal ancestor.
(
boris the spider,
Tue 25 May 2010, 0:21,
archived)
What a player he must have been.
(
Peter_G,
Tue 25 May 2010, 0:56,
archived)