Past Stories by Subject

Dark Matter - June 2008
Turns out most of the universe is held together by a mysterious, invisible substance.

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Island of Stability - October 2006
Follow the decades-long quest to create the elusive element 114.

Phoenix Mars Lander - July 2008
NASA's latest robot has already found frozen water and is looking for more signs that the Red Planet could support life.

Profile: Arlie Petters - July 2007
A boy from a rural village in Belize grows up to become a world-class mathematician and cosmologist.

Saving Hubble - July 2008
Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.

The Search for ET - July 2008
Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?

Space Storms - July 2008
Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth.