Weightier penguins have wobblier waddles

A new study has found penguins have more of a wobblier waddle when they put on weight.

Researchers at the University of Roehampton, in England, studied a group of ten king penguins.

They measured the penguins' weight and studied their movements on a treadmill, finding that fatter birds were less steady on their feet.

The team think wobbly penguins may face greater danger from predators as they slide around and struggle to stay upright.

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