
"About the size of a basket ball" does kind of make you realise how at the mercy of fate we are down here :/
( , Sat 8 Dec 2012, 21:41, Reply)

they hit the earth every 100 years I think, so we should be in for a treat soon
( , Sat 8 Dec 2012, 22:02, Reply)

that one was around 100 meters and 10-15 megatons according to wikipedia
It is possible that a smaller one could have hit since then and was just too far away from anywhere to be noticed though
( , Sat 8 Dec 2012, 22:36, Reply)

I am not a haunted person as a smoker; how the hell would they detect something the size of that hurling our way?
( , Sat 8 Dec 2012, 22:12, Reply)

here's some interesting info though:
impact.arc.nasa.gov/intro_faq.cfm
As far as warning goes, the short answer is "we will either have a long lead time or none at all."
( , Sat 8 Dec 2012, 22:48, Reply)

thank goodness Jupiter has the habit of soaking so much of these cosmic pebbles heading our way
( , Sat 8 Dec 2012, 23:04, Reply)

That despite being thirty years old, I re-bought off abebooks.co.uk a few months ago
'The Science in Science Fiction' by Nicholls, wonderful read
( , Sun 9 Dec 2012, 0:01, Reply)