The 2 million people who visited Angkor Wat in Cambodia last year may have missed something.
They would have seen the intricate, kilometre-long carvings. They couldn’t have missed the famous drooping tree roots curling around the 12th century ruins.
But there was one thing that hadn’t been discovered yet. Barely visible to the naked eye, covering many of the Buddhist temples, are the remains of century-old graffiti left behind by the first visitors after Angkor Wat after it was abandoned in 1431.
Using the same techniques employed by NASA to highlight colour differences on martian landscapes, scientists extracted the lost graffiti from images.
They discovered more than 200 drawings of ships, Gods, buildings and animals. The findings were reported in Antiquity.