competition, therefore more of the same prey available? >> david: yeah. >> anthony: i haven't seen a lot of them going into the water, but their looking for some indicator that there are fish in there. >> david: they're afraid to cross the ice crack because leopard seals might be in them. they're very hesitant so then finally they make the plunge. >> anthony: i mean, they're very agile. they don't look though at first at first brush. they appear clumsy, but i'm watching them and they've got a lot of moves. >> david: yeah, they're very, very agile. >> anthony: increasingly people want to see penguins. they are much loved by, you know, children everywhere. a lot of people would like to come to antarctica as tourists and look at penguins up close in a natural environment without impacting in a negative way. is that a good thing? >> david: and the thing about antarctica is that most scientists you know keep their nose to the grind stone. so the only advocacy for antarctica has to come from the public. it's very valuable to have these tours 'cause then people have an ownership, you know they've been there and they see it. >> anthony: what keeps you coming back? i mean other than the work. >> david: i wanted to come to