It's crunch time for comet as it hurtles toward a close encounter with the sizzling sun.

Experimental device lets paralyzed people drive wheelchairs by flicking their tongue in the right direction.

Comet ISON is teasing the solar system as it dances with the sun and it's giving astronomers mixed signals.

The sun-grazing Comet ISON will either fry and shatter or endure to put on one fabulous celestial show.

Agency released its first progress report Thursday, and CDC officials said they're mostly pleased.

Scientists witness biggest, brightest cosmic explosion ever seen.

Regular nut eaters were less likely to die of cancer or heart disease during a 30-year Harvard study.

Rocket streaks through night sky in East as NASA puts smartphone, other satellites into orbit.

Analysis finds today's generation don't run as fast or as far as their parents did when they were young.

The Big Apple will become the first large city in the United States to prohibit sales to young adults.