Prof Hangst said the antigravity measurement was just an "interesting sideshow" for the experiment.

BBC: Antigravity gets first test at Cern's Alpha experiment

So why has he penned a book on a topic usually confined to pulp sci-fi--antigravity?

FORBES: Newton's Laws, Upended

He talks to Evgeny Podkletnov, a Russian physicist who claims to have achieved antigravity effects in his lab.

FORBES: Newton's Laws, Upended

The team has now gone back to their existing data on 434 antihydrogen atoms, with the antigravity question in mind.

BBC: Antigravity gets first test at Cern's Alpha experiment

The best limits they can suggest is that they are less than 110 times more susceptible to gravity than normal atoms, and less than 65 times that strength, but in the opposite direction: antigravity.

BBC: Antigravity gets first test at Cern's Alpha experiment

He describes, for example, antigravity projects now under way at NASA and at BAE Systems in the U.K. FORBES' phone calls to these organizations verified Cook's facts, though folks were awfully careful with their language.

FORBES: Magazine Article

You don't see antigravity.

CNN: 'Fireflies' to scope out space rocks for mining