Ranked #1

How Things in the Universe Came About and How They Ended Up Within Us
How Things in the Universe Came About and How They Ended Up Within Us
Dr. Tom Abel (Stanford University) takes us on an illustrated journey through the early stages of the universe, using th... Read more
25 Jul 2016
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Ranked #2

The Many Mysteries of Antimatter
The Many Mysteries of Antimatter
Antimatter is just like matter with all its properties reversed. Scientists think there may have been equal amount of ma... Read more
12 Apr 2010
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1hr 17mins
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Ranked #3

Multiple Universes and Cosmic Inflation: The Quest to Understand Our Universe (and Find Others)
Multiple Universes and Cosmic Inflation: The Quest to Understand Our Universe (and Find Others)
Our improving understanding of the cosmos points to an early epoch during which the universe expanded at a stupendous ra... Read more
18 Jun 2011
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Ranked #4

Einstein’s Blunder Undone: The Runaway Universe
Einstein’s Blunder Undone: The Runaway Universe
In the past 20 years, astronomers have shown that the universe is not only expanding, but speeding up. In this talk, Har... Read more
19 Jan 2016
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Ranked #5

Black Holes: The End of Time or a New Beginning?
Black Holes: The End of Time or a New Beginning?
While black holes are popularly associated with death and doom, astrophysicists increasingly see them as creators, not d... Read more
19 Dec 2012
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Ranked #6

Hearts of Darkness: Black Holes in Space
Hearts of Darkness: Black Holes in Space
Black holes are regions of space where gravity is so strong that nothing, not even light, can escape! No longer confined... Read more
3 Aug 2010
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Ranked #7

Finding a New Earth: Exoplanets and the Habitable Zone
Finding a New Earth: Exoplanets and the Habitable Zone
Over 1500 new planetary systems have now been discovered, many of which include planets quite different from those in ou... Read more
25 Jul 2016
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Ranked #8

The Dark Side of the Universe: Dark Matter and Dark Energy
The Dark Side of the Universe: Dark Matter and Dark Energy
In the last decade or so, astronomers have been forced to accept two mysterious observations. About a quarter of the uni... Read more
30 Jun 2009
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1hr 24mins
Ranked #9

The Dawn of Creation: The First Two Billion Years
The Dawn of Creation: The First Two Billion Years
All the great islands of stars got their start in the first billion years after the beginning of time, the Big Bang. Eve... Read more
1 Apr 2009
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1hr 55mins
Ranked #10

100 Years of Einstein's Relativity (And How it Underlies Our Modern Understanding of the Universe)
100 Years of Einstein's Relativity (And How it Underlies Our Modern Understanding of the Universe)
2015 marks the 100th anniversary of Einstein’s completion of his General Theory of Relativity, the comprehensive theory ... Read more
7 Jul 2015
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Ranked #11

Saturn's Moon Titan: A World with Rivers, Lakes, and Possibly Even Life
Saturn's Moon Titan: A World with Rivers, Lakes, and Possibly Even Life
Titan, Saturn's largest satellite, is the only moon with a thick atmosphere. In many ways, Titan is a cold twin of the E... Read more
24 Mar 2011
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Ranked #12

The Copernicus Complex: Are We Special in the Cosmos?
The Copernicus Complex: Are We Special in the Cosmos?
Is humanity on Earth special or unexceptional? Extraordinary discoveries in astronomy and biology have revealed a univer... Read more
30 Oct 2014
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Ranked #13

Monster Black Holes: What Lurks at the Center of Galaxies?
Monster Black Holes: What Lurks at the Center of Galaxies?
Black holes are among the most fascinating objects in the cosmos, in part because they can grow to monstrous size, swall... Read more
25 Jun 2014
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Ranked #14

How the Universe Went from Smooth to Lumpy: The Modern Origins Story
How the Universe Went from Smooth to Lumpy: The Modern Origins Story
Dr. Eliot Quataert of the University of California, Berkeley, provides an overview of the modern understanding of our or... Read more
29 Oct 2013
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Ranked #15

The Ultimate Fate of the Solar System (and the Music of the Spheres)
The Ultimate Fate of the Solar System (and the Music of the Spheres)
The long-term fate of the planets in our Solar System has intrigued astronomers and mathematicians for over 300 years. A... Read more
23 Nov 2010
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Ranked #16

How Galaxies were Cooked from the Primordial Soup
How Galaxies were Cooked from the Primordial Soup
The lumpiness of today's universe of galaxies is a fundamental characteristic that took billions of years to grow. Dr. S... Read more
26 Feb 2013
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Ranked #17

Our Explosive Sun: New Views of the Nearest Star and the Largest Explosions in the Solar System
Our Explosive Sun: New Views of the Nearest Star and the Largest Explosions in the Solar System
Recent satellite missions are giving scientists dramatic new views of the Sun and the huge magnetic explosions in its ou... Read more
13 May 2011
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Ranked #18

Report from the Planetary Frontier: The Latest from New Horizons at Pluto
Report from the Planetary Frontier: The Latest from New Horizons at Pluto
On July 14, 2015, the New Horizons spacecraft flew 7,800 mi above the surface of Pluto and sent back fascinating images ... Read more
24 Jun 2016
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Ranked #19

Innumerable Globes Like This One: The Search for Life Beyond the Solar System
Innumerable Globes Like This One: The Search for Life Beyond the Solar System
Our Galaxy probably hosts billions of planetary systems. But how many of those planets are like the Earth and how can we... Read more
24 Jun 2016
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Ranked #20

The Search for Intelligent Life Among the Stars: New Strategies
The Search for Intelligent Life Among the Stars: New Strategies
A half-century ago, astronomers began trying to "eavesdrop" for radio messages from nearby star systems. However, today,... Read more
10 Mar 2010
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