They are large, gray, and wrinkly. And when they do brush their teeth â well, those are 9 pound molars they have to deal with. Now that we have your elephant yearnings out of the way, letâs make some elephant toothpaste and help those guys out. So go call your friends on the elephone and get them ready, this experiment is going to elephantastic fun (groan). 1  Place the plastic bottle in the center of the cake pan.
The biggest pyramid in the world is the Great Pyramid of Giza. Archeologists believe that it was built for Fourth Dynasty Egyptian Pharaoh Khufu and was completed in 2560 BC.
Height: 146m (481ft) The oldest of three pyramids on the outskirts of Cairo, The Great Pyramid of Giza was built as a tomb over a 10 to 20-year period ending around 2560BC. It was originally 146.5 metres tall but erosion has reduced its height to 138.8 metres. It is the only surviving Wonder of the Ancient World.