NASA's Mars rover 'Curiosity' has fired its laser for the first time on the red planet, using the beam from a science instrument to interrogate a fist-size rock. The mission's Chemistry and Camera......
People speak for roger wiens
Q. which is longest railway tunnel in the world ? : A. fallowing are the list of railway tunnels Switzerland Gotthard Base 57 072 m 2010 "Galleria del Base del San Gottardo". Length of...... more