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Most estimates of the mortality risk posed by asteroid impacts put it at about the same risk as flying in a commercial airliner. However, you have to remember that this is like the entire human race riding the plane - it is one of the few risks that really could wipe us all out.

You only live once. You don't want your tombstone to read: 'Played it Safe.'

The nice thing about asteroids is that once you've found them, and once you have a good solid orbit on them, you can predict a hundred years ahead of time whether there is a likelihood of an impact with Earth.

Tombstones don't talk back.

Statistics on the dangers guns pose to the health of their owners and those who live with them suggest that I'd be safer selling my guns than reserving them for 'Tombstone II.'

Many peoples' tombstones should read 'Died at 30, burried at 60.'

I have my tombstone already. A tombstone company in the East gave it to me when I jumped Snake Canyon. My plot is in Montana.

An asteroid can literally destroy 80 or 90 percent of the species that are alive on Earth. These are big events. I mean, this is called extinction.

The tombstone is about the only thing that can stand upright and lie on its face at the same time.

Your next SMS will probably be around longer, and remain more legible, than your tombstone. For, unlike your tombstone or even your mortal coil, your texts may be worth something.