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Science quiz: How do ducks stay warm?

Bird feathers have millions of tiny structures called barbs and barbules.
These structures lock together to form millions of tiny spaces.
Suface tension causes tiny drops of water to stick to these structures and trap air inside the tiny spaces in the feathers.
Because the air is trapped inside the feathers, no more water can get in.
The air in the feathers keep the duck afloat AND insulate it against the cold

Our winner this week is Tegan Bielawski