I think it would revolutionise the scientific world. people would realise the world is round, that the heavens are not constant and this would lead to more and more changes in science.
This was realised well before 1000AD.
I think it would revolutionise the scientific world. people would realise the world is round, that the heavens are not constant and this would lead to more and more changes in science.
ASB, I would say.
Is this actually ASB or is it possible to form a ring around a planet?
Note that there may have actually been rings around the Earth at the end of the Eocene (35 million years ago).
So, the POD could be that such an event occurred in the late Pliestocene instead.
"Rings around the Earth: A clue to climate change?"
http://www.sandia.gov/news-center/news-releases/2002/earth-sci-fossil-fuel/ringworld.html
"The terminal Eoceneevent: formation of a ringsystem around the Earth?"
http://www.nature.com/nature/journal/v285/n5763/abs/285309a0.html
And there was no mass extinction? well I see no reason man wouldn't survive the event then, even if there was cooling. Might even make more ice and create falling sea levels and that would be pretty interesting
(and not all extinctions are large-scale dino-killers)