Posted: Nov 06, 2016 10:42 am
There is no substance to criticise.
These experimental tests* of General Relativity theory show G has varied by less than 1% over the 13-odd billion years since the bang.
*Specifically on page 23.
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=2490483#p2490483