Main content
Rare Earth
Episode 5 of 5
Geography series with Dr Iain Stewart. Life on Earth prospers because it enjoys the right amount of heat from the sun, and the atmosphere prevents meteorite bombardment.
Geography series with Dr Iain Stewart. Our planet is unique within the solar system. Four-and-a-half billion years ago it had a twin named Theia which was absorbed into the Earth, increasing its gravity and allowing it to form an atmosphere. Iain travels to Meteor Crater in Arizona to explore the atmosphere's role in protecting us from bombardment by meteorites. Life on earth only prospers because it is provided with right amount of heat from the sun.
Last on
Thu 2 Dec 2021
01:00
More episodes
Previous
Next
You are at the last episode
Credit
| Role | Contributor |
|---|---|
| Presenter | Iain Stewart |
Broadcasts
Tue 18 Dec 2007 21:00大象传媒 Two except East & Yorkshire
Thu 20 Dec 2007 02:35- Sun 30 Dec 2007 17:05大象传媒 Two except East & Yorkshire
- Sun 17 Feb 2008 22:00
- Sun 31 Aug 2008 19:00大象传媒 Two except East, Scotland & Yorkshire
Sun 28 Dec 2008 12:00大象传媒 HD- Mon 21 Sep 2009 20:00大象传媒 HD
- Fri 26 Mar 2021 14:00大象传媒 Two except East, Scotland, Wales (Analogue) & Yorkshire
- Wed 1 Dec 2021 20:00
- Thu 2 Dec 2021 01:00