Archeologist begin searching for Egypt's lost 4th pyramid, in this clip from Season 1, "The Lost Pyramid."

In the Valley of Kings lay the tombs of many ancient Egyptian pharaohs and powerful nobles.

Learn the reason for the death of Cleopatra.

The death of one of history's most enigmatic rulers—Egypt's King Tutankhamun—remains shrouded in mystery 3,300 years later.

Evidence reveals that ancient Egyptians developed advanced weapon-making techniques, making them a force to be reckoned with.

Rising from the sands of the Egyptian desert is one of the ancient world's greatest wonders—the mighty Sphinx.

Workers carved the 700-ton Obelisks of Luxor from a single piece of red granite.

Ancient Egyptians developed a form of aspirin 5,000 years before the advent of modern medicine.

The Great Sphinx is an engineering marvel even by today's standards.

Did you know that the Great Pyramid of Giza weighs 6.5 million tons? Get the facts on what makes this ancient wonder a true architectural marvel.

Omar visits the Egyptian New Kingdom to uncover how soldiers and charioteers trained.

Ramses built the Temple at Abu Simbel in Egypt to intimidate his enemies and seat himself amongst the gods.

Following the death of her father, Ptolemy XII Auletes, Cleopatra is crowned Queen of Egypt.

An ancient pharaoh is credited with the construction of the Abu Rawash and the Great Pyramid - both are considered to be engineering marvels, in this clip.

Take an inside look at the tombs of ancient Egypt, and the chilling message encoded within the walls.

Some of the greatest monuments of all time were built 1,000s of years ago. Learn more about the dark secrets behind Egypt's biggest monuments.

Some mysteries may never be solved—but others are begging to be! Explore nine ancient enigmas in this episode of History Countdown.

Experts take a deeper look at the ancient Egyptian civilization, the practice of mummification, and the crocodile god Sebek.

According to one theory, an accident caused the untimely death of teenage pharaoh King Tut. How might a broken leg have sent him to his tomb?

Legend has it that Cleopatra took her own life by succumbing willingly to the bite of a cobra. If this story is true, was suicide by snake venom an easy way to go, or did the last Egyptian pharaoh die in excruciating pain?

The Lighthouse at Alexandria was the first known lighthouse and stood for 1600 years on the coast of Egypt.

Ramesses II ran a mighty Egyptian Empire that combined art and engineering, but what led to its fall?

At one time, ancient Egypt was the most important civilization in the world. Here are some things you may know not about it.

From Egypt to Greece, explore different solutions throughout history for constructing giant structures like obelisks and temples.

The super ships of the ancient world provided numerous benefits to the Egyptians and created new modes of transportation.