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Can we order some? >> 2:00 in new york city? come on. if you cant get pizza, what has this country come to? weve got "the skinny" coming up. the competitors getting the boot from "dancing with the stars." and bono and one direction have something else in common. the trainer who trusts the bear so much hell put his head in his mouth. lessons from the wild. youre watching "world news now." >> announcer: "world news now" weather brought to you by olay total effects. lessons from the wild. youre...

Looking at a small group of chronic marijuana smokers. compared to nonusers, their brains were smaller in the frontal cortex. are you paying attention? >> yeah. >> this is important information for you. the frontal cortex is the part that controls your decision-making. they also found the flow of traffic and other parts of the brain in those marijuana users is actually faster. how do you explain that? it means the brain may be trying to compensate for being a smaller brain and its working a litt...

Them. you want to let them know that you are in the area so that they have time to make calculations. >> reporter: if you dont have much time to calculate, do you run? do you stand? do you try to make yourself large and make a lot of noise? >> you would never run. never run. absolutely never run under any condition. and slowly back away. >> reporter: but if you are attacked -- >> to protect ones vital spots, you would cover your face and your neck and try to get on to your stomach. you would try...