The demand for refurbished gadgets continues to rise. Tech consumers are embracing these affordable and sustainable ...

For years, NASA's Mars Reconnaissance Orbiter — a spacecraft circling the Red Planet — has seen white material lining dry gullies thought to be dusty water ice. This environment in the Martian tropics ...

Nuclear waste remains toxic for thousands of years. How do you build a storage facility that will keep it safely buried for ...

One day last January, close to two-dozen people rose at dawn to hand-sow thousands of pounds of native plant species across a vast swaths of sand, silt and clay that had emerged when the reservoirs ...