The two lawmakers questioned the necessity of the nuclear weapons agency's plutonium pit strategy in a letter exclusively ...

SEATTLE — New batches of plutonium-238 may become available to NASA starting in 2017, perhaps preventing feared shortages of this vital spacecraft power source. The United States has not produced ...

An undated photo capturing the Plutonium Facility at Los Alamos National Laboratory, with the Rio Grande valley and the Sangre de Cristo mountains in the background. (Photo courtesy of Los Alamos ...

Over the course of two weeks, a government pledge, that dozens of nuclear weapon cores known as pits could be made by 2030 at new and improved facilities some 1,600 miles apart, publicly crumbled.

Deep space exploration, in which spacecraft travel to the outer reaches of our solar system or beyond, requires a whole lot of power. For NASA, a valuable source of this power is a radioactive ...

Voyages into space are among the most iconic endeavors of the 20th and 21st centuries. Spacecraft that have ventured out to this “final frontier” have relayed stunning images and enlightening ...

Barbara Scollin, grandniece of Major Gen. Kenneth D. Nichols continues her series on his life. ***Ample reasons, most notably leadership skills, personality traits and qualifications, led to choosing ...