The investigative researchers of Bellingcat announce Shadow Finder Tool, a simple way of geolocating photographs using the position of Earth’s subsolar point—where the Sun is directly overhead—to narrow down search to a handful of countries and locations. “If you know the date and time an image was taken, and can make accurate measurements of the height of an object and the length of its shadow, you can identify the ring of possible areas where the image was taken,” the researchers explain.