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More americans report getting less sleep. now a study in the journal "sleep" may have found a connection. researchers put 225 people in a laboratory setting. some of them were allowed to sleep ten hours a day. while the others were allowed only four hours sleep. after 18 days, the sleep-deprived group gained about 2 pounds more than the group that slept well. the weight gain came because the the sleep-deprived ate 500 extra calories a day during the extra time they stayed awake at night. in other word, insomniacs have more time for snacking. and those midnight snacks were the worst. they appar...

Cancer research center. we're also working with a doctor who is the lead on this from the chemical census institute and dr. charley johns son from penn physics. all of us together are working to see if we can figure out the best way to identify a scent, an odor that can help us, predict who already has cancer, even before this sort of standard screening test would be useful. jon: we have some video now of dogs and women obviously in a training session. but as i understand it, you wouldn't actually have potential cancer patients in their doctor's office with your lab bro door, -- labrador, woul...

Additional training that can take place where they can become assessors, trained assessors or even experts at some point and that all depends on how good their god given talents are. >> in a nontraining environment once the folks who have been through your training are out in the field, how do they actually test the seafood? are they smelling, tasting, both? how much of a sample are they smelling or tasting at a time? >> well, one of the things they learn in the class is that the environment has to be controlled in, when you're doing this testing. so it's somewhat difficult when you're naught ...

Yeah, if you look at the video, i don't know if you can run it for -- on the show. >> jeff: it's rung. >> okay. the first six seconds of the video, there is a lot of white material coming out of the end of the pipe. and that is the gas. in fact, you can see it float upwards in the video. quite a bit more rapidly than the oil does. >> jeff: and then it turns dark. >> right. and that's the oil. toward the end of the video. i based my analysis -- yeah, go ahead. >> well, i mean, as another engineer, you trace a particle, then, and you have software that measures how fast it's going? >> exactly. t...

Video, there is a lot of white material coming out of the end of the pipe. and that is the gas. in fact, you can see it float upwards in the video. quite a bit more rapidly than the oil does. >> jeff: and then it turns dark. >> right. and that's the oil. toward the end of the video. i based my analysis -- yeah, go ahead. >> well, i mean, as another engineer, you trace a particle, then, and you have software that measures how fast it's going? >> exactly. the name of the technique is called particle image velasymmetry, and basically that means measuring the velocity of the fluid based on a parti...