Who is leaving colorful, wood-carved birds in not-so-obvious places along Milwaukee’s Oak Leaf Trail? No one knows, but ...

The cells that make up the walls of the finest of all lymphatic vessels have a lobate, oak leaf-like shape that makes them particularly resilient to changes in fluid volume. A similar cell shape also ...

The USPS often releases new designs for stamps, such as the fishing-themed images on last week's new set of Forever Stamps, or stamps that commemorate public holidays, or the advent of a new year.

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