Is it me, or does Brian Greene keep changing contrast throughout this?<br>Is that studio lights?  Or, is that just the radiation coming off his brain?,(reply>), @Mauricio Gonzalez I still like to think it's the light from his brain cranking into ludicrous speed....,(reply>), Seems like the camera was left to auto exposure. It’s quite a contrast of light/dark when he moves closer to light source the camera is over compensating, then re-adjusting. 🎥