A black hole inside the Earth might actually raise temperatures on the surface enough to sustain animal life long after the Sun dies out.
Life requires more than heat. Animals need a food source, and mostly that's plants and plants require photosynthesis
Photosynthesis (English pronunciation: /foʊtoʊˈsɪnθəsɪs/; from the Greek φώτο- [photo-], "light," and σύνθεσις [synthesis], "putting together", "composition") is a chemical process that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight
Source
So potentially a black hole inside the earth could keep it warm. But all life would still die off as the entire ecosystem that supports it would wither and die without sunlight.
I wonder how long we could last under those conditions? Once the sun is "gone" the next harvest, the next season, would never come, so a matter of months?
And that is ignoring the fact that when our sun "dies out" it's going to grow in size and envelope the inner planets.
ETA: I'm well aware that some basic forms of life exist without sunlight, but I'm talking in general terms, I don't consider amoeba surviving as a "win"
edit on 15-11-2011 by phishyblankwaters because: (no reason given)






