A $2 billion cosmic ray detector on the International Space Station has found the first significant hint of dark matter, the mysterious substance that is believed to hold the cosmos together but has never been directly observed, scientists say.
Former U.S. congresswoman Gabrielle Giffords toured the European particle physics laboratory Wednesday, cheerfully facing reporters but saying little during her first trip abroad since being shot in the head last year.
Endeavour's astronauts accomplished the No. 1 objective of their mission Thursday, installing a $2 billion cosmic ray detector on the International Space Station to scan the invisible universe for years to come.
NASA might ask the shuttle astronauts to take a closer look at some damage to heat tiles on the orbiter's belly.
A mammoth cosmic ray detector arrived at the International Space Station on Wednesday, a $2 billion experiment that will search the invisible universe and help explain how everything came to be.
