Egypt pyramids scan finds anomalies
An international team of architects and scientists have observed "thermal anomalies" in the pyramids of Giza, Egyptian antiquities officials say.
Thermal cameras detected higher temperatures in three adjacent stones at the bottom of the Great Pyramid.
Officials said possible causes included the existence of empty areas inside the pyramid, internal air currents, or the use of different building materials.
It comes as experts search for hidden chambers within the pyramids.