m.f. merrick." >> the discovery was turned into a documentary film and a life lesson for the students -- "go for your goal." >> it doesn't matter how big it is. all you have to do is push for it. >> and they learned another lesson -- science can be exciting and deep -- very deep. for "teen kids news," i'm emily. >> it's time for "word," a chance to test your vocabulary by finding the real meaning of some rather interesting words. how about this one? it's a noun. does it mean... [ bell rings ] "placebo" is a harmless pill given to a patient in the place of a medication. as in, she's not really sick... [ girl coughs ] ...but a placebo seemed to make her feel better. okay, here's another. it's an adjective. does it mean... [ bell rings ] "gargantuan" means "really, really big." it comes from the name of a giant in french literature -- gargantua. how about... is it... [ bell rings ] the answer is -- "gnu," a large african antelope with an ox-like head. as in, "what's new at the zoo?" "a gnu." so, how'd you do? that's "word" for now. >> they've led the country. how much you know about them? her