If an object floating through space passes near the line of sight between the earth and a distant star, its gravity should, according to the theory of relativity, bend and focus the light from that star.

ECONOMIST: The dark side of cosmology

Space-time, according to Einstein's theories of relativity, is a four-dimensional fabric woven together by space and time.

WSJ: Einstein Proved Right on Gravity��Again

For, according to Dr Pyykko's calculations, relativity explains why tin batteries do not work, but lead ones do.

ECONOMIST: Einstein and car batteries