Scheidies says he doesn't buy the argument that the blackout glasses ''level the playing field'' between runners who have some sight and those who have none.
More startling still is the sudden cut to hard, unglamorous gray-greens, and the sight of Freddie hacking the heads off cabbages in a California field.
"This means that by watching what happens to the positions of the quasars on the sky as the gravitational field of Jupiter moves past their line-of-sight, the scientists can test other aspects of the general relativity theory, " says Professor Shanks.