摘要
Universal gravitatipn might travel at the speed of light:A group at the CAS Institute of Geology and Geophysics got hints from their pbservations of gravity tides during solar eciipses.
After repeated observations and decade-long research, a group of geophysicists led by Prof. .TANG Keyun at the CAS Institute of Geology andGeophysics （IGG） announced on December 26, 2012 that gravity, which Isaac Newton assumed to transmit ＂＇at once＂ or at an infinite velocity, might actually travel at a limited speed as Ihst as light.
