request for help

Tue, 14 Apr 1998 07:56:35 -0600 (CST)


I would like to ask for a short summary of the
chronology of life on earth, with approximate dates
according to our current understanding. This
would obviously begin something like this:

15 billion years ago creation of the universe
4.5 billion y. a. formation of the earth
3.8 billion y. a. first appearance of life

I am particularly interested in approximate dates for
the appearance of plant life, fish, birds, amphibians, reptiles,
dinosaurs, mammals, hominids (including particular types),
and anatomically modern man. Any available dates of disappearance
from the fossil record (as in the dinosaurs roughly 60 million y. a.)
would also be helpful. Perhaps some kind soul would be willing
to type out a short list and then point me to a more detailed reference
in an easily accessible source.

Glenn, I think you have probably done something like this in the past,
but unfortunately I haven't saved it. Could you (or others) help?

Thanks in advance,

Stan Zygmunt
Dept. of Physics and Astronomy
Valparaiso University
Valparaiso, IN 46383