Depending on whom you talk to, terraforming could take anywhere from 50 years to 100 million years to complete. The surface might one ... may cause humans on Mars to evolve differently than ...
A better idea: Redirecting water-rich comets and asteroids to crash into Mars. That too would release gases from below the ...
Scientists have considered placing Mylar disks, with a diameter of 155 miles and a weight of 200,000 tons, to reflect sunlight onto Mars and heat the surface. The idea is that over many years ...
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