How do you catch a comet? Dr. Matt Taylor, Rosetta Project Scientist at the European Space Agency, explains how. Dr. Taylor outlines the ESA’S mission in this video: the Rosetta spacecraft has been on a ten year journey to comet 67P/Churyumov-Gerasimenko, and this year it will land on its surface, analysing molecules in samples drilled from its nucleus. Why, exactly? Because as Dr. Taylor explains, ‘Comets can be considered a time capsule from the beginning of the solar system’. The project appeared at the Royal Society’s Summer Science Exhibition.