10 things that happened the last time Serena Williams was not World No. 1

Gravity was just a concept, not a film

Less Isaac Newton, more George Clooney this time. The Oscar-winning science fiction film Gravity, which features Clooney and Sandra Bullock as astronauts on NASA’s space shuttle, Explorer, and won seven Academy Awards – including for Best Director.

But before then, it was just the concept that keeps planets revolving around the sun, humans to the earth and then some.