Ranked #1
The Oldest Question: Is There Life Beyond Earth?
The Oldest Question: Is There Life Beyond Earth?
Our reconstruction of the chronology of events that led to the origin of the Earth and subsequent chemical evolution on ... Read more
14 Mar 2011
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1hr 14mins
Ranked #2
Origins of Black Holes: Gravity at Its Extreme
Origins of Black Holes: Gravity at Its Extreme
Gravity is the most important force in the universe, holding together planetary systems, stars, and galaxies. It is what... Read more
8 Mar 2011
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59mins
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Ranked #3
Astronomical Alchemy: The Origin of the Elements
Astronomical Alchemy: The Origin of the Elements
One of the greatest achievements of twentieth-century science is an understanding of the origin of matter. While hydroge... Read more
26 Feb 2011
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1hr 4mins
Ranked #4
Dark Matter, Dark Energy and Inflation: The Big Mysteries of Cosmology
Dark Matter, Dark Energy and Inflation: The Big Mysteries of Cosmology
Our current cosmological model describes the evolution of the universe from a very early burst of accelerated expansion ... Read more
22 Feb 2011
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1hr 11mins
Ranked #5
Origin of the Universe: The Big Bang
Origin of the Universe: The Big Bang
The scientific story of creation begins 13.7 billion years ago in a circumstance of incredible temperature and density, ... Read more
22 Feb 2011
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1hr 5mins