Meidum is the least-known of the pyramids of Egypt but the most mysterious. It stretches skywards and resembles a castle keep. The compound in which it is located is one of the largest monuments in the world. Thanks to the exceptional use of archaeology 2.0 and its drones, scientists can delve into the heart of this building which opens up to the skies. They can unravel the stages of its monumental construction and uncover the revolutionary techniques used.

• Zahi Hawass