Researchers and alien enthusiasts try to explain the mystery of 'alien coffins' found in Egyptian Pyramid. The mysterious coffin-like boxes made of granite were discovered in 1850 in a serapeum northwest from the Pyramid of Djoser. The precision of the boxes, which was believed to be at least at 20th or 21st century standard leading to speculations about how these boxes were made.   

According to experts, the 100-ton black granite boxes with lids weighing at least 30 tons were made very skillfully. The stones were cut in precisely flat surfaces and right-angled corners. Although Egyptians were known to have advanced skills in Mathematics and Geometry which they applied in building perfect pyramids, experts can't explain how they were able to make the 'alien coffins' with extremely high precision.

"The precision is very 21st century, or at least 20th century," alien and UFO theorist Brien Foerster said according to the Daily Star. He added that the construction of the surfaces and the angles are "within a few ten thousandths of an inch"

UFO hunters suggest the granite boxes might be made by aliens with superior technology who visited ancient Egypt. They pointed out that the precision engineered boxes do not match the inscriptions found around its surface. The body of the boxes is inscribed with hieroglyphics which are of very low quality, which makes it hard to believe that they were made by the same skillful hands who made the boxes.   

Egyptologists admitted to the low quality of the inscriptions but added that it is not a surprise ancient Egyptian engineers were capable of such extraordinary engineering feat with their advanced mathematical skills.

The researchers added that the alien boxes were made for the burial of Apis bulls, which Egyptians worshipped as incarnations of the god Ptah, cited the Daily Express, and were made to hold the mummified remains of the bulls. However, the boxes were found to be empty leading alien believers to theorize they were made for the burial of extraterrestrial aliens but they left earth soon after before they die.