A notable entry in Mary Mulvihill’s Ingenious Ireland: The Coelostat from Dublin Institute for Advanced Studies which provided proof of Einstein’s Theory of Relativity. Maria Koutoulakis pictured with the Grubb Coelostat and Einstein Lens. Photograph: Mark Steadman

I was late for an appointment with my chiropractor when I spotted the book. It jumped out at me from a prime position on a front-window shelf of a cha(...)

A graphic illustration showing the loxodromic and great circle routes from New York to Beijing

If you fly 14,500km due westward from New York you will come to Beijing. The two cities are on the 40th parallel of latitude. However, by flying a gre(...)