Mars's big splat | csmonitor.com
Rated • 1 review • astronomy • csmonitor.com
"The Borealis Basin is Mars's broad northern bald spot. It has presented experts with a longstanding puzzle. On average, it's about 2-1/2 miles lower than the southern highlands, which make up the rest of the planet. And the crust under the basin is nearly 16 miles thinner.
Over the years, scientists have offered dueling explanations for the difference. One involves a collision from a comet or asteroid."
Over the years, scientists have offered dueling explanations for the difference. One involves a collision from a comet or asteroid."
