The issue focused on life on Earth was raised by British astronaut Tim Peake at the opening ceremony of the International Astronautical Congress in Dubai.As part of the scientific theme of the conference, Mr Peake raised the idea of whether life could exist beyond Earth.He told delegates that there were ways of exploring this possibility and said it would be better if people thought about it more seriously.After Mr Peake made his speech, Prof Tony Benn, who helped write the declaration on life beyond Earth, took to the stage