Hacker News new | past | comments | ask | show | jobs | submit login

helped or hindered, does that mean there was basically a window of opportunity and life made it?



Perhaps not in this particular example. Without the oxygen, a bi-product of life, no ozone and no limitation of UV radiation. However other windows of opportunity may have closed. Such as seems to have happened on Mars and Venus.


Note that the oxygen in atmosphere was created by life itself. Oxygen molecules are highly reactive and without a process that continually produces them they would eventually disappear.




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: