This cave of crystals, buried around 300 metres below Naica mountain in Mexico's Chihuahuan desert, contains some of the largest natural crystals ever found. The cave (10 metre wide, 30 metre long)

scientists have always been puzzled by hills mysteriously rising from the sea floor in the Arctic Ocean. A paper recently published in the journal Geophysical Research Letters (Vol 34 No 1) offers an

even as the Union ministry of environment and forests has come out with an environment impact assessment (eia) notification to reconfigure the eia regime in September 2006, three task forces are

Sustainable transport, Nepal style