The Hello, Hello and this week why penguins can't fly how cockroaches avoid stumbling into

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And up first, time now for our news headlines and kicking us off Kate

biologists think they've worked out why penguins can't fly.

Yeah I've always been fascinated as to why penguins can't fly but luckily Carl

Elliot and his team from the University of Manitoba in Canada have been looking into

it for me. So flight is this adaptive trait and penguin's ancestors used to be able to fly

but over time they've lost the ability to do it.

And we always thought this was because penguins don't have a lot of predators around.

There aren't many polar bears hanging out in the South on all though cartoons would tell us otherwise

and there's not a lot of food around so scientists thought that maybe penguins

had to spend all their energy trying to die for food but penguins also

have to travel huge distances between their breeding

and feeding grounds and it'd be a lot easier to fly there rather than just sort of waddling

about over thick ice. And also other seabeds that have a lot of food around, some of them are still flightless as well.

So they figured there's got to be another reason why they've evolved over time not to be able to fly.

And this team decided that there might be a trade-off or of adaptability between being

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