From one to many: All of
the species within each of the groups below share a common ancestor. Click on the image
of one of the groups to see some of its more notable representatives -- and explore the
results of adaptive radiation.
Tenrecs of Madagascar
The 30 species of this diverse group of mammals are unique to the
island of Madagascar. They all share a common ancestor that probably arrived near the
end of the age of the dinosaurs, 60 or 70 million years ago.