#asteroids

science-junkie
sagansense:

What happened…when the object apparently responsible for the extinction of the dinosaurs hit the Earth 65 million years ago? “First, there was a gigantic fireball brighter than the Sun as the comet plunged to its death, not with a whimper, but a bang. One casualty was the ozone layer, which temporarily vanished. Seconds after the big comet first encountered Earth’s upper atmosphere, it carved out a crater - now buried - 200 kilometers wide and 25 kilometers deep. All that debris shot up into the sky and came back again, all over the Earth. No place would have been spared a hit of at least a tiny particle.
More…

It’s fascinating to think that if the asteroid never hit Earth, dinosaurs may very well still rule the planet and humans may have never even evolved. This seems pretty important when considering extraterrestrial life, and the hope that it’s intelligent.

sagansense:

What happened…when the object apparently responsible for the extinction of the dinosaurs hit the Earth 65 million years ago?

“First, there was a gigantic fireball brighter than the Sun as the comet plunged to its death, not with a whimper, but a bang. One casualty was the ozone layer, which temporarily vanished. Seconds after the big comet first encountered Earth’s upper atmosphere, it carved out a crater - now buried - 200 kilometers wide and 25 kilometers deep. All that debris shot up into the sky and came back again, all over the Earth. No place would have been spared a hit of at least a tiny particle.

More…

It’s fascinating to think that if the asteroid never hit Earth, dinosaurs may very well still rule the planet and humans may have never even evolved. This seems pretty important when considering extraterrestrial life, and the hope that it’s intelligent.