Alex Bellos Earlier today I set you a puzzle about keeping homes cool in a heatwave. Here it is again with the solution.
Alex Bellos is a Puzzle Setter at Yahoo News UK. He has been setting a puzzle every two weeks since 2015, exploring themes in science, education, and the natural sciences, with a focus on topics such as physics, biology, and astronomy. Alex's work has been featured in notable publications including Yahoo News, The Guardian, and Atlas Obscura.