Post History
Awesome question. I love this kind of thing. Wikipedia of course has a a page on near-Earth supernovae, and the first body paragraph briefly examines the effects of life on Earth. The only really ...
Answer
#1: Attribution notice removed
by
System
·
2020-06-01T14:13:39Z (almost 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/3616 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/