Stretching up towards the sky, The Great Pyramid of Giza was the tallest man-made structure on Earth until Lincoln Cathedral was completed in 1311 AD. That’s an impressive 3800-year record.

There are an estimated 2.3 million blocks strategically placed on top of one another that were transported from nearby quarries. Impressive!

So how was it built?

The Greeks thought that the pyramid must have been constructed by slaves. However, most modern-day scholars believe that it was built by thousands of skilled workers who were actually paid for their labour. The first salary in history?

Most of the blocks were chiselled out of solid rock with copper tools, then wooden pieces were squeezed into these gaps. Water was poured onto these pieces and they would expand and with time crack the rock. They were probably rolled across the sands using tree logs. There is also the theory that the sand was wetted with water and the huge blocks were dragged along on huge sledges.

It’s not universally agreed upon how an ancient civilisation was able to move and lift such huge objects - some blocks weigh around 90 tonnes. The various hypothesis of construction includes Giant ramps, Pulleys (even though they hadn’t been invented yet), Levering systems, Concrete casting, the fringe theory that the pyramid was made from the inside up using an internal ramp and many more.

And no. It wasn’t aliens.