David Kaiser

Particle physics is at once the most elegant and brutish of sciences. Elegant because of its sweeping symmetries and exquisite mathematical structures. Brutish because the principal means of acquiring information about the subatomic realm is revving up tiny bits of matter to extraordinary energies and then smashing them together. Imagine trying to discern the hidden inner workings of a...

Twenty years ago, the science writer Dennis Overbye published a marvellous book, Lonely Hearts of the Cosmos, in which he traced the development of cosmology – the scientific study of the universe as a whole – during the second half of the 20th century. The cosmologists in Overbye’s book were lonely for two reasons. They included the last remnants of a generation of...

My mother rarely calls to talk about my research. In April, however, she rang to ask: ‘Do you agree with Stephen Hawking?’ That’s usually an easy question to field. On topics ranging from the behaviour of black holes to the structure of the early universe, a safe answer is yes. But that wasn’t what my mother wanted to know. She wanted to know whether I agreed with the recently retired Lucasian Professor of Mathematics that trying to contact aliens was a bad idea. Any extraterrestrial civilisation that could receive our communiqués and act on them, Hawking warned, might show up on our doorstep, and wouldn’t necessarily be friendly. ‘Such advanced aliens,’ Hawking said, might be ‘looking to conquer and colonise whatever planets they can reach.’ In no time at all, the word spread from Hawking’s voice synthesiser to the world’s blogosphere. Soon even my mother was calling.