In 1968, an X-ray was taken of Tutankhamun’s golden mask.
The golden mask of King Tutankhamun, as seen through X-ray imaging, until recently, archaeologists believed that the mask had been made from a single piece of gold. But to their surprise, when the mask was examined using X-rays, they discovered something unexpected.
The X-rays revealed that the mask was actually made up of multiple parts, carefully joined together with an incredibly precise soldering technique, so fine that it is invisible to the naked eye.
At that moment, everyone was astonished by the level of knowledge and technological advancement the ancient Egyptian civilization had achieved in metallurgy and gold craftsmanship.