>> um...rudolph, blixen. um...oh, my gosh...nixon. >> dancer, prancer, blitzen, dasher, cupid, donner, rudolph, and...oh, no! >> um...like, snowy...uh... >> dasher, donner, blitzen, vixen, rudolph...comet, cupid... uh... >> rudolph is definitely one. >> prancer...what else? dancer, juan. >> ok, so, there's dancer and prancer and comet and vixen and... rudolph wasn't one, right? >> okay, guys, nice try, but here are the right names -- and did you know the original name of the poem was "a visit from st. nicholas"? it was published in 1823. for "teen kids news," i'm sam. >> why do people sigh? according to new research, it's not because of love or sadness. subjects in an experiment were given an impossible puzzle. when they couldn't solve it, they sighed. so it could be we sigh when we give up. >> we all know teens who are stand-outs in academics. maybe you even know a pair of very smart twins. but erika has a story about quadruplets -- four siblings, each one of them qualified to join a club of intellectual sup