Archaeologists used radar and other methods to find an underground structure near the pyramids and cemeteries in Giza, Egypt.Archive Photos/Getty Images Archaeologists discovered secret structures in ...

Scientists in a now-retracted study analyzed Gunung Padang and claimed a pyramid site underneath was over 16,000 years old and made of lava. Photo from Natawidjaja, Bachtiar, Nurhandoko, Akbar, ...