Within the genus Homo, cranial capacity again doubled from H. habilis through Homo ergaster or H. erectus to Homo heidelbergensis by 0.6 million years ago. The cranial capacity of H. heidelbergensis overlaps with the range found in modern humans.
The original height of the Pyramid was 146.5 m (488 ft), but today it is only 137 m (455 ft) high, the 9 m (33 ft) that is missing is due to the theft of the fine quality white Tura limestone covering, or casing stones, for construction in Cairo. It is still the tallest pyramid.
It was the Great Pyramid of Egypt, one of the largest structures ever built by man and one of the oldest. Its north side was 755 feet 4.9818 inches in length; its west side was 755 feet 9.1551 inches in length; its east side was 755 feet 10.4937 inches; its south side 756 feet 0.9739 inches.bviously, therefore, the ancient master-builders who had raised the Pyramid at the very dawn of human civilization must have had powerful motives for wanting to get the alignments with the cardinal directions just right.