On June 30, 1908, a giant fireball exploded over the forests of Tunguska in Siberia. The impact leveled hundreds of miles of ...

in what we call a depositional basin. So that's a place where sediment accumulates. and you will never ever turn into a fossil. meaning one that lacks oxygen. That way, the microbes won't decay the ...

I sent out a story on changes in Alaska over the past few million years. The theme: Many of the transitions were drastic, and ...