The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

Discover 10 perfectly preserved Byzantine-era crocodiles on the banks of the Nile. Untangle the puzzle of the Namib Desert's grass circles, locate the remnants of a lost foreign-ruled city in Egypt, and solve the riddle of Peru's Band of Holes.

Investigating an odd phenomenon that makes rocks slide across Death Valley; learning how pieces of jade rewrite Chinese history; examining animal bones that could show an earlier human arrival in the Americas; visiting Earth's oldest stone circle.

Connect the Great Pyramid to an archeological find near the Suez Canal, then unveil the secrets of colossal rock sculptures in Saudi Arabia. Gaze at a mystical geological formation deep in the Sahara and unmask a 37-million-year-old Egyptian enigma.

Travel to Cairo to examine a stunning find under the Pyramid of Unas' watchful eye. Search for a 16th-century Portuguese shipwreck in the Namib Desert, unearth a WW II plane that crashed in the Sahara, and study a fossilized missing link in Taiwan.

Unveil the legacy of a prehistoric Peruvian hunter and dig up what may be the ruins of a fabled Roman seaside city in Tunisia. Listen to a haunting sand-dune symphony in Mongolia, then catalogue a trove of human and animal bones in Saudi Arabia.