Professor Brian Cox says he is optimistic about the survival of the human race thanks to advances in private space flight. The British celebrity particle physicist said he finds hope in advances such as Elon Musk’s SpaceX capsule – the first commercial spacecraft to dock at the International Space Station on March 3. Cox told the South China Morning Post he thinks that if humans can become a spacefaring civilisation and colonise other planets, they could effectively become immortal. Speaking…