It is famous among scientists because she kind of predicted the future as in 2015, gravitational waves are discovered which supports her theory in which now some physicists believe in. Back in the 90s, the theory about people being pushed was crazy despite scientists beforehand eg; Einstein briefly stating it before rejecting it by the vast amount of criticism that arose from it.
Ooh...it's spooky Phoebe said this! but we to remember this is Phoebe, she is generally someone with a question mark. Maybe she is not as stupid as we thought she was or secretly, she believes in everything Einstein says.