hostile

But space is a hostile environment for the human body, with high levels of radiation, something both sperm and egg cells are highly sensitive to.

What if we take Venus, one of the most hostile and deadly places in the solar system and turn IT into a colony?

How Venus was once the most hostile planet around.

Even worse, for a bacterium or virus your body is a hostile ecosystem applying selective pressure.

For months and years the planet will be a hostile and deadly place.