Not Slippery When Wet

A tree frog's specially designed feet allow it climb wet or dry slopes.

By Emily Sohn, 00:00 AM June 8, 2006

A gecko has amazingly sticky feet (see "How a Gecko Defies Gravity"). In fact, if you pull hard enough on a gecko stuck to a glass plate, you might break the plate. A tree frog's foot doesn't have so powerful a grip, but it still must allow the frog to climb wet, slippery leaves—sometimes while the frog is upside down.

Now, scientists have figured out how a tree frog manages to keep its grip.

A tree frog's toes can grip both wet and dry surfaces.

A tree frog's toes can grip both wet and dry surfaces.

Thomas Endlein

A tree frog's foot is covered with...

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