more proof this afternoon that we are not alone. nasa just made a major announcement a few moments ago. scientists apparently have discovered the first known system of seven earth-sized planets around a single star. all of these seven planets could have, could have water, which, of course, as we know is the key to life as we know it. scientists now say that finding a second liveable world like ours, it's now not an if, but a when. so, there's that. here's today's pulse question. do you believe there is life on other planets? do you believe there is life on planets other than earth? the pulse is live. that's a serious question. pulse.msnbc.com. that's going to wrap up this hour of "msnbc live." my colleague katy tur is from this earth. i was going to say you're out of this world and then i thought, no, you're from this earth.