Cosmic Certainties 19 September 2016

More trouble with string theory, an attempt to do away with inflation, and a novel theory of dark matter, critiqued.
A review of “Fashion, Faith and Fantasy in the New Physics of the Universe” by Roger Penrose.
[Wall Street Journal]

Understanding gravity 21 August 2004

An invisible hand
A gravitational mystery affecting pendulums and satellites–could General Relativity be wrong?

Understanding gravity 15 April 2004

Turn, turn, turn
A new satellite, Gravity Probe B, will test Einstein’s General Theory of Relativity.

General relativity 9 January 2003

Jupiter calling
Scientists have at last measured the speed of gravity. (This measurement is now controversial.)