How humans may live on Mars

In an experiment two to three centimetres of silica aerogel allowed light from a lamp tuned to simulate Martian sunlight to heat the surface beneath it by up to 65C (150F) - enough to raise temperatures on the Martian surface and melt water ice.

This is what Asteroid Bennu looks like

If Asteroid Bennu hit our planet, it's estimated the kinetic energy of this impact would be equivalent to 1,200 megatons – that's 80,000 times the energy of the Hiroshima bomb.