Today, 21 June, marks the June solstice! For millennia, we relied on the solstice as a way to tell time. Now, optical lattice clocks use a large number of atoms trapped in a laser interference pattern to provide a high level of timekeeping accuracy. Follow along in this infographic, which shows how timekeeping has evolved from ancient civilizations to possibly redefining the second. #Solstice #JuneSolstice #Timekeeping #Clocks