Here's why the Hyatt Regency collapsed. In our longer video about it, we look at some of the biggest construction mistakes in history ...

Oldest Pyramid In Ancient Egypt, The Step Pyramid Of Djoser, Saqqara Egypt. 14 Years Of Renovations.

While Guinness World Records officially lists the Djoser Step pyramid in Egypt as the world’s oldest pyramid (around 2,630 BC), one paper published in October claimed a layer of the Gunung Padang ...