You probably won't read this, but:
http://www.slate.com/articles/health_and_science/animal_fore...
It's not enough that an asteroid hit the Earth, but it's such a simple theory that everyone can remember, it has been popularized by everyone.
http://www.slate.com/articles/health_and_science/animal_fore...
It's not enough that an asteroid hit the Earth, but it's such a simple theory that everyone can remember, it has been popularized by everyone.
I did assume however that volcanic activity could've been as a result of the impact.