Season 4
Episodes
1. Glacier Meltdown
2007-01-31
No overview available.
2. Destructive Forces
2007-02-21
No overview available.
3. Stone Age Apocalypse
2007-02-28
No overview available.
4. Comets
2007-03-07
No overview available.
5. Prehistoric Americans
2007-03-14
No overview available.
6. Deep Space Probes
2007-03-27
Great distances and dangerous environments make robotic spacecraft the best way for scientists to explore our solar system. Acting as our eyes and ears, these probes have revealed secrets about the distant planets and their moons, their surfaces, weather and environments.
7. Dino Meteor
2007-04-12
No overview available.
8. Planet Storm
2007-04-26
No overview available.
9. Polar Apocalypse
2007-04-01
No overview available.
10. Killer Lakes
2007-05-03
Since the death of 1,700 people near a lake in Africa, scientists have uncovered a terrifying series of hazards in lakes across the world.
11. Ring of Fire
2007-08-02
No overview available.
12. Alien Safari
2007-08-09
With advanced technology in their hands, astronomers and scientists may now be capable of detecting extraterrestrial life in the universe. In fact, some think the proof may be found in as little as a decade. Astronomers involved in the effort, including those at SETI (Search for Extraterrestrial Intelligence), discuss the possibilities and the likely spots for finding life outside of Earth.
13. Hyper Hurricanes
2007-10-18
No overview available.
14. Dangers of the Deep
2007-10-25
No overview available.
15. Solar Force
2007-10-30
No overview available.
16. Birth of the Solar System
2007-11-06
Thanks to new developments in the technology of astronomy, scientists have been able to collect new information, giving them clues to how our solar system was formed.
17. Hubble Trouble
2007-11-06
No overview available.