"Learn Biology" is an interactive journal for the study of biology. It was formed in February '08, and since then we have moved from simple to complex according to cladistics. We have covered molecular biology, genetics, cell behavior, cladistics, evolution, botony, zoology, anatomy, nutrition and ecology. Mac is an expert in this field and he has posted 35 essays to guide the group, which have become 64 chapters in a book called "Biology for Everyone". The latest copies are in the files section.

I invite anyone to join, read, and post on biology, especially those who would like to learn more! I reserve the right to moderate any member. Thanks for understanding.

-Mark

Photo:

The Mesozoic Age closed at what is called the KT boundary. The great reptiles were gone, albeit a few lingered on, such as the crocodiles.

The beginning of the Tertiary age was the Eocene period, 65 million years ago, geologically almost modern. The mammals exploded into all the niches vacated by the reptiles, and the insects evolved rapidly too due to the appearance of flowering plants.