re: #234 SixDegrees

Estimates put it at between 50 to 100 miles in diameter, if it was a rocky object, traveling around 30 to 60 mph.

Not that large.

[Link: edition.cnn.com…]

A hundred mile in diameter object hitting the earth would pretty much wipe us out and most life on the planet. The supposed dinosaur killer was thought to be only 6 miles in diameter.