Hubble's Greatest Hits
After 25 years on the job, the Hubble Space Telescope stands as "one of the world's most productive and popular scientific machines."
Along the train route that his body traveled home, people debate Lincoln's legacy.
A Lincoln Gallery
Photos show the struggles of the nation etched into the president's face.
How Coal Fuels India's Insurgency
Militants capitalize on human poverty amid mineral wealth.
The Bug That's Eating the Woods
A warming climate is good for pine beetles - which is very bad for forests.
Trajan's Amazing Column
On a pillar of Carrara marble, an emperor's exploits tower over Rome.
Proof | Argentine Identities
A photographer glimpses many cultures in the faces of the country's people.