CAPE CANAVERAL, Fla. — The space shuttle Endeavour, the youngest orbiter in NASA's fleet, soared into the morning sky Monday to begin the final mission of its 19-year career.
Endeavour blazed a path through the sky here at the Kennedy Space .
New Planet Found in Our Solar System
Richard A. Lovett in Timberline Lodge, Oregon
for National Geographic News
An as yet undiscovered planet might be orbiting at the dark fringes of the solar system, according to new research.
Too far out to be easily .
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