A keel or carina in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs. The keel provides an anchor to which a bird's wing muscles attach, thereby providing adequate leverage for flight. Keels do not exist on all birds; in particular, some flightless birds lack a keel structure. Historically, the presence or absence of a pronounced keel structure was used as a broad classification of birds into two classes: Carinatae (from carina, "keel"), having a pronounced keel; and ...

Evel Knievel (; October 17, 1938 – November 30, 2007), born Robert Craig Knievel, was an American daredevil, painter, entertainer, and world-famous icon. In his career he attempted over 75 ramp-to-ramp motorcycle jumps between 1965 and 1980, and in 1974, a failed jump across Snake River Canyon in the Skycycle X-2, a steam-powered rocket. The over 433 broken bones he suffered during his career earned him an entry in the Guinness Book of World Records as the survivor of "most bones broken in a lifetime". Knievel was born in Butte, Montana in 1938 and raised by his grandparents. After watc...