Weekend field trips on the WebBy Alan Boyle, Science Editor, NBC News• 'Nova' on PBS: 'Supersonic Dream' • The Economist: To catch a gravitational wave• The Engineer: Robot dogs evolve their own language (via Slashdot) • Scotsman.com: 1,000 toga-clad skeletons found in Rome catacombsAlan Boyle, Science Editor, NBC News
