the Energizer bunnies of Mars

Those little NASA rovers Opportunity & Spirit (though Spirit is currently hibernating, awaiting the end of Martian winter) just keep on going.  As of today, they've beaten the Mars mission lifespan of the Viking 1 lander, thus setting a new duration record for a Mars lander mission. 

Read all about it here, from Space.com . .. . or here, from NASA.

And if you're an American taxpayer, send up a cheer for your tax dollars at work.