Here's the news segment Nikhar presented today:
It is impossible to tell the exact number of craters on Mars. A newly developed high resolution imaging science experiment camera or HiRISE camera for short shows that there are an approximate 200 craters freshly being carved into Mars' surface every year. The reason why there are such a high number of asteroids rocketing towards Mars has to do with the fact that Mars' atmosphere is quite thin and doesn't have the ability to burn up the asteroids while they are floating in the atmosphere around Mars.
These asteroids typically aren't very big, ranging from 1-2 meters in diameter. The craters themselves are on average 3.9 meters big.
This may not seem like such a big thing for us now, but if we decide to move to Mars, it may be troublesome having to run away from a flying rock every 2-3 days. This may also provide leads and reasons why there isn't any life on Mars, if there ever was any.