The Lightning Field
The Lightning Field, by the American sculptor Walter De Maria, is a work of Land Art situated in a remote area of the high desert of western New Mexico. This is a tribute to the great artist.
Sound: Cello and Arp 2600 synthesizer
Faster than light
The special theory of relativity implies that only particles with zero rest mass (i.e., photons) may travel at the speed of light, and that nothing may travel faster.
Particles whose speed exceeds that of light (tachyons) have been hypothesized, but their existence would violate causality and would imply time travel.