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<a href="https://www.dcu.ie/maths/people/peter-taylor">Dr Peter Taylor</a>, an Assistant Professor at the Centre for Astrophysics and Relativity (CfAR) in the School of Mathematical Sciences at DCU, provides an answer. </div>

Scientists from Dublin City University answer scientific questions in ordinary language in two minutes. If you have a question for us, get in touch with the podcast producer, Seán Duke, email: sean.duke@dcu.ie