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A lab where scientists for weeks ntis time get an up close look at how Climate Change is altering life on the ocean floor. Buried alive the frantic tarch for survivors after an fvalanche hits a swiss ski resort. And former prisoners change peir lives by taking the stage ind writing their own second act. This is the Cbs Evening News with norah odonnell. Garrett good evening, yoeryone. Norah is off tonight. Im Major Garrett. We begin with postholiday headaches for millions of travelers, especially...

>> reporter: you can forget youre 50-odd-feet below the surface here. >> you really can. >> reporter: if you dont look out the window. the point of being down here is that actually living on the sea floor means scientists can do dre than just take the relatively short dives that are possible from the surface. they become, says marine ecologist mike heithause, sea creatures themselves. you can be the ocean down here. >> you really can be the ocean and you get a sense of change you dont with just ...