I gotcher extinction event RIGHT HERE, buddy.

New data from the Mars Reconnaissance Orbiter and Mars Global Surveyor are strong evidence that the Borealis basin on Mars, long believed to be of volcanic origin, is in fact the largest known impact structure in the solar system.

We're talking an impact structure 5300 miles in diameter, left by an impactor estimated at 1200 miles diameter.  Holy CRAP, that had to have been one hell of a bang.  I'm not even going to attempt to calculate the approximate equivalent yield.

According to the NASA article, it covers about 40% of the surface of Mars.

POP QUIZ!

Q:  What does a deranged Jamaican rapper have in common with pirate treasure?

( A: ... )