30 september 2009
46 min
Lecture 6: The Geological Revolution - Deep Time and the Age of the Earth
The geological revolution revealed that the Earth is of great antiquity
and yet has a history we can read in the land. We will discuss ideas
of cyclic and linear time, historical versus physical age estimates,
the discovery of geological time, and
radiometric dating methods that give us our present estimate of
4.54+/-0.05 Gyr for the age of the Earth. Recorded live on 2009 Sep 30
in Room 1005 Smith Laboratory on the Columbus campus of The Ohio State
University.
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Astronomy 141 - Life in the Universe
Visar 1–10 av 46 avsnitt
23 september 2009
Welcome to Astronomy 141
0 min
23 september 2009
Lecture 1: Introduction
19 min
24 september 2009
Lecture 2: Astronomical Numbers
44 min
25 september 2009
Lecture 3: Imagining Other Worlds
40 min
28 september 2009
Lecture 4: The Copernican Revolution
44 min
29 september 2009
Lecture 5: The Chemical Revolution and the Nature of Matter
45 min
1 oktober 2009
Lecture 7: The Biological Revolution - What is Life?
44 min
2 oktober 2009
Lecture 8: The Cosmological Revolution - The Depths of Space and Time
46 min
5 oktober 2009
Lecture 9: Inside the Earth
43 min
6 oktober 2009
Lecture 10: The Earth's Atmosphere Erratum
1 min