A recent article in Forbes explores the future of humanity in the context of colonizing Mars, suggesting that a long-term energy source is necessary is required for mankind's survival on the red planet. Colorado Geological Survey geothermal geologist Paul Morgan weighs in on the topic, addressing the challenges and differences between accessing Mars' geothermal energy sources vs. those on Earth. From the story: But more likely, access to geothermal energy would require drilling down several kilometers. “If you can drill deep enough to get the heat, then you have to work out some way to get the ....