So far, they escape
despite kilometer-scale detector systems of discovery: gravitational waves,
vibrations of space-time whose survival Einstein forecast in his theory of
general relativity. However, the detection of gravitational waves could soon be
possible. And not with special detectors, but with ordinary radio telescopes
that measure the arrival time of the radio signals from pulsars. The vibrations
are there but not - as has been mostly assumed - as a sort of background noise,
but it dominate individual signals of individual sources.
