Σκανάροντας το παρελθόν - Πυραμίδες. Time Scanners - Egyptian Pyramids

The Pyramid of Khafre (right) is the second largest of the pyramids at the Giza Necropolis. Ahead of his Time Scanners show on the National Geographic Channel, structural engineer Steve Burrows tells us how Egypt's iconic pyramids were built to last for thousands of years.

Έχοντας στα χέρια τους, μηχανήματα τελευταίας τεχνολογίας, κορυφαίοι επιστήμονες σαρώνουν με λέιζερ τα αρχαία μνημεία και μας αποκαλύπτουν πολύτιμα μυστικά και δίνουν απαντήσεις σε σημαντικά ερωτήματα.

Η ομάδα, ταξιδεύει την Αίγυπτο για να μελετήσει τις πυραμίδες, τα ταφικά μνημεία των πανίσχυρων Φαραώ, και να ανακαλύψει τα μυστικά της κατασκευής αυτών των οικοδομημάτων, που αποτελούν τα πιο εντυπωσιακά κτίσματα του αρχαίου κόσμου.

Three-dimensional laser scanning has revealed why the Great Pyramid of Giza is still standing today.

Before the Great Pyramid, the Egyptians hadn’t cut the stones accurately enough to make the joints really tight. They had problems with what’s called ‘freeze thaw’. This is when moisture gets into the joints, so if the weather gets cold enough, the water freezes, solidifies and expands – pushing the joint apart. That cycle of the joints being opened and closed effectively makes buildings fall apart, and we have that problem today. The Egyptians had realised that – they knew that if they could construct joints so tight that water couldn’t get in, then the building would not destroy itself and it would last a long time. They did this in the Great Pyramid.