U.T. Experiment Grapples With Essence of Gravity

We have all experienced gravity, but even to the brightest minds in science, it remains largely a mystery. Gary J. Hill, an astronomer at the University of Texas at Austin, is trying to change that.

“We don’t know why there’s gravity,” said Mr. Hill, one of the lead astronomers on the Hobby-Eberly Telescope Dark Energy Experiment, or Hetdex, which could turn gravity’s time-honored laws on their head. “We have a pretty good theory of it. It may be that our observations could have a bearing on finally formulating why gravity exists.”