is it possible to create a perfect vacuum? - rolf landua and anais rassat Published 7 years ago • 1M plays • Length 4:32 Download video MP4 Download video MP3 Similar videos 4:43 a brief history of banned numbers - alessandra king 25:34 how ai is unlocking the secrets of nature and the universe | demis hassabis | ted 7:38 i don't think we can control ai much longer. here's why.