> Earth even if hit by an asteroid that killed dinosaurs, Chicxulub impactor, would be more habitable than Mars. Not initially. Maybe after a few days or weeks

> Earth even if hit by an asteroid that killed dinosaurs, Chicxulub impactor, would be more habitable than Mars. Not initially. Maybe after a few days or weeks. The thermal pulse from the impact itself would have instantly charred terrestrial life for some portion of the Americas. And the reentry of ejecta radiated enough heat to ignite forests around the globe. Anyone on Mars would be sitting lucky, well situated to begin the recolonization of Earth.