A comet could smash into Mars later this year, and scientists are — thrilled! http://econ.st/12GfFJ4

Watching this hole being torn in the planet’s crust and charting the crater’s subsequent development over hours, months and years would be a remarkable opportunity for planetary geologists. Most of the solid surfaces in the solar system are pockmarked with large craters, and much has been deduced about the processes that take place when they form. Actually seeing one created would put those deductions to the test.

via Cometary billiards: Have you heard, it’s in the stars | The Economist.