Internal Structure of the Earth
The earth is differentiated into concentric
shells of material that differ with respect to:
5. Physical State
Numbers refer to
depth below surface
Natural Selection does not always favor big brains.
Heres a case where being smart doesnt help much.
Fossils & Fossilization
1. What is a Fossil?
2. How are Organisms Fossilized?
3. How Good is the Fossil Record?
Fossils - any evidence of ancient life
remains of body parts
Crisis #1: the Origin of Life
Outline of Subjects to be Discussed
1. Origin of the Earth and Solar System
2. Origin of the atmosphere
3. Origin of the ocean
4. Origin of Life
Models for lifes origin
Timing of the origin of life
5. Hadean Environments
Our approach will be to examine what fossils tell us
about the History of Life
the ORIGIN OF LIFE to the ORIGIN OF HUMANS
Our focus will be on Times of Crisis, i.e.
on Watershed Events that produced
new directions in the History of Life
and led to th
How can we determine when events occurred in human history?
(for example, the last successful invasion of the British Isles)
We look into archives for written records.
Can we use this approach to determine the times of
occurrence for events