Does life have meaning? For thousands of years, humans have searched for a meaning behind our existence. Now, one physicist has given his take on one of the most fundamental questions of all time.
Time travel is possible, says top scientist
Glossary
Superstring theory - An attempt to explain all of the forces of nature by modelling them as vibrations of tiny supersymmetric strings.
Thesis - A long essay involving personal research.
Entropy - A gradual decline into disorder.
Atoms - The smallest unit of any chemical element.
Stardust - Matter from stars that exploded.
Cosmic - Relating to the universe or cosmos.
Fluke - An unlikely chance occurrence.
Perverse - Being deliberately unreasonable, awkward or illogical.
Mona Lisa - Also known as the Giaconda, a portrait by the Italian artist Leonardo da Vinci. It became one of the world’s most famous paintings after a successful robbery in 1911.