I hope they lived in bunches

[quote]Before they were killed off by a meteor that hit Earth 66 million years ago, some 20,000 adults of the iconic ferocious dinosaur predator — Tyrannosaur rex — roamed North America at any given time, researchers have calculated.[/quote]

That averages 1 per 477 sq miles.

So the odds are, on my way to Grandmother's house, I'd run into one going or coming back.

Yikes.