"Time Travel" - A talk given by Ted Leath at Derry BarCamp 2009 Physicists debate whether physical time travel is possible or practical. In the meantime, virtual time travel is possible, accessible and relatively inexpensive. This talk was meant to inspire people about the possibilities of time travel - now!

1. Ted Leath BarCamp Derry October, 2009

14. Thomas Edison had long been credited with inventing sound reproduction. Newly revived is the work of "Édouard-Léon Scott de Martinville, a Parisian typesetter and tinkerer. Scott's device had a barrel-shaped horn attached to a stylus, which etched sound waves onto sheets of paper blackened by smoke from an oil lamp. The recordings were not intended for listening; the idea of audio playback had not been conceived. Researchers at the Lawrence Berkeley National Laboratory figured out how to decipher Scott's recorder using optical imaging. Scott's 1860 phonautogram was made 17 years before Edison received a patent for the phonograph.