[ZEN]

[boroboy]

[ZEN]

[thunda]

[thunda]

Every time I watch this episode the thing that stands out is the temperature of the planet's surface, 120 degrees below zero, I assume that's celcius. I wondered what life would be like on a planet like that which got me to wondering if life on Earth could survive those temperatures which got me wondering if life on Earth, humans in particular, could exist with no sun. Despite what you're thinking the answer is yes, it would be possible. Once we get past the fact that without the sun to orbit the Earth would fly off into space the Earth actually has its own heat radiating from its core but the surface would drop to 0° F (that's Fahrenheit, you convert it) in a week. After a year it would dip to –100°, photosynthesis would halt leading to most plants and trees dying within weeks. Naturally animals would follow but humans could survive living in nuclear or geothermal-powered habitats. Other possibilties would be living in submarines in the deepest, warmest parts of the ocean or harnessing volcanic or geyser heat. So theoretically humans can exist without a sun.
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"Women, food, and inflicting pain -- in no particular order."
- The Fifth Legion

[RichardWho]

Of course if we ever master Nuclear Fusion we'd be able make to make an artificial sun.

The above post reminded me of that Dr Who Big Finish Audio in which Sally Knyvette guests as the creator of The Cybermen. The people who become the Cyberman live beneath the surface of Mondas after it gets torn out of earth orbit. Like the Moon in Space 1999.