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Oct 2009
47m 19s

Lecture 20: The History of Life on Earth

Richard Pogge
About this episode
In this lecture we step back and look at the history of life on Earth from the first signs of life at start of the Archaean Eon 3.5 billion years ago to just up to the present day. We will review the appearance of photosynthesis and the rise of oxygen in the atmosphere in the Proterozoic, the appearance of the first eukaryotes and sexual reproduction, and t ... Show More
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Oct 2009
Lecture 21: Impacts and Extinction
We end our exploration of life on the Earth with a look at death in the fossil record. This lecture looks at the role asteroidal impacts have played in the history of the Earth, and their possible role in mass extinction events in the fossil record. We will discuss near-earth ast ... Show More
46m 31s
Oct 2009
Lecture 22: The Family of the Sun
This first lecture of Unit 4 - Life in the Solar System - is a quick tour of our Solar System reviewing the planets, dwarf planets, moons, and small bodies that make up our celestial home. This lecture will introduce many of the places we will be considering in detail over the ne ... Show More
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Oct 2009
Lecture 23: Terrestrial Worlds in Comparison
We follow our tour of our Solar System with an in-depth comparison of the Terrestrial Planets. In particular, we want to contrast and compare their geological and atmospheric histories. This will inform our inquiry into whether or not we expect to find life on these worlds. Recor ... Show More
46m 41s
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