posted on Feb, 4 2009 @ 01:46 AM
A new, complete 'tree of life' tracing the history of all 4,500 mammals on Earth shows that they did not diversify as a result of the death of the
dinosaurs, says new research published in Nature.
The multinational research team has been working for over a decade to compile the tree of life from existing fossil records and new molecular
analyses. They show that many of the genetic 'ancestors' of the mammals we see around us today existed 85 million years ago, and survived the meteor
impact that is thought to have killed the dinosaurs. However, throughout the Cretaceous epoch, when dinosaurs walked the earth, these mammal species
were relatively few in number, and were prevented from diversifying and evolving in ecosystems dominated by dinosaurs.
The tree of life shows that after the MEE, certain mammals did experience a rapid period of diversification and evolution. However, most of these
groups have since either died out completely, such as Andrewsarchus (an aggressive wolf-like cow), or declined in diversity, such as the group
containing sloths and armadillos.
This alone changes everything. Such as the info here as well:
Relatives Of Living Ducks And Chickens Existed Alongside Dinosaurs More Than 65 Million Years Ago -