April 1, 2010 • 1h
The collisions that created Earth and the moon; the people who work to stave off the apocalypse; violent impacts deep in the cosmos.
April 8, 2010 • 1h
Earth's weather is compared to that of other planets; cataclysmic space weather that could cripple life on Earth.
April 15, 2010 • 1h
Are we alone? It's an age-old question that was relatively "taboo" in mainstream science until the mid-1990s, when astronomers fou...Read more
April 29, 2010 • 1h
Our ancestors' relationship with the heavens led to some of mankind's ancient discoveries and greatest creations. The ancient Gree...Read more
May 6, 2010 • 1h
More than 70 percent of Earth is covered in water, but we've only explored roughly 5 percent of it. We've roamed even less of our ...Read more
May 13, 2010 • 1h
Earthquakes and volcanoes pose an unpredictable and deadly threat here on Earth, but they also occur far out in the universe. What...Read more