collision evidence found

[varek]

A fragment of the collision between either 2 asteroids, or an asteroid and some other body, during the Ordovician period may have led to more diverse live on Earth 470 million years ago.

http://www.independent.co.uk/news/s...ed-to-explosion-of-life-on-earth-9582066.html

 

[Haggis and tatties]

470 million years ago, such a figure really does put our small time on this planet into perspective.

 

[MacLeod]

Esp. when you consider our planet is some 4.5 billion years old, the universe is 15 billion or so years old.

 

[Dryson]

The time frame does seem close to fitting biological model of cause and effect that would have changed the biology of early humans to a new mutation that we have evolved into.

 

[gturner]

I don't think that was as big a change to early human biology as having to shift our diet away from trilobites, which sadly went extinct in the Permian, possibly due to overfishing by the Japanese and Scandinavians.

 

[Metryq]

Trilobites—that's an information packet in three-phase computing, right?