It was the summer solstice this week in the northern hemisphere. About 45 miles from Physics World headquarters, people at Stonehenge celebrated as the Sun rose at 04:51 Thursday morning. According to a new book called Megalith: Studies in Stone, the builders of Stonehenge were using Pythagoras’ theorem 2000 years before the Greek mathematician was born. You can read more in this article in The Telegraph.

Meanwhile in Derbyshire, pupils at Saint Anselm’s School are looking for a Bakewell tart that was last seen dangling from a high-altitude balloon 16,000 m above the English countryside. The pie-in-the-sky was launched by pupils on Monday as a science project to measure temperature, take photos and track the balloon. Unfortunately, all contact with the balloon was lost as it drifted over Saxilby, near Lincoln. The youngsters are hopeful, however, because a balloon launched last year was found on a beach near Skegness.

Everyone loves a pop quiz about science and the Perimeter Institute for Theoretical Physics in Canada has put together a real cracker that focusses on quotations. Have a go here, but take note that it’s not easy: “Quotation quiz! Who said these wise words about science?”.