We could still find evidence of the Big Bang and an expanding universe a trillion years from now, even with no galaxies visible in the night sky.

Tiny bacterial factories dubbed “bacterial dirigibles” might someday deliver disease-fighting chemicals straight to a targeted body part - like your intestine.

California condors were all but extinct a few decades ago. Their numbers are up, and they are now at the center of the controversy over lead hunting ammunition.

You're not likely to see much of the planet Jupiter in early May 2011. However, the giant planet quickly climbs away the glow of dawn throughout the month. When will you first spot Jupiter, the sky's second planet, in the east before sunrise?

There's antimony, arsenic, aluminum, selenium, and hydrogen and oxygen and nitrogen and rhenium ...

Stretching and twisting lines can visually portray the warping of space-time and solve a mystery surrounding merged black holes.

Ryan Kerney and a team of biologists found green algae living inside salamander embryo cells, the first cellular-level symbiosis ever seen in a vertebrate.

The voyage of Yuri Gagarin lasted 108 minutes, 89 minutes of which were in space. He orbited the Earth once in his Vostok 1 capsule.

NASA Astronaut Cady Coleman and Jethro Tull's Ian Anderson perform the first space-Earth duet celebrating Yuri.

The Fukushima situation has not changed, but the rating on the severity scale has been raised from 5 to 7, highest level on an international scale.