Undated handout photo issued by University of California of the main mass of the Chelyabinsk fall at the Chelyabinsk State Museum of Local History shortly after recovery from Chebarkul Lake. Photograph: PA

The threat of space rocks smashing into Earth is bigger than previously thought, according to scientists studying the terrifying meteor that exploded (...)

US president Barack Obama arrives at the Federal Emergency Management Agency (FEMA) National Response Co-ordination Center in Washington. Photographer: Shawn Thew/Pool via Bloomberg

The White House has signalled that it would be open to a short-term hike in the US debt limit as the United States moved a step closer to its first-ev(...)

Brandon Smith removes broken glass from the West Thrift Shop in the town of West, near Waco, Texas. Photograph: Mike Stone/Reuters

Rescue workers searched the rubble of a fertilizer plant in a small Texas town today looking for missing firefighters and survivors of a huge (...)