A look at the 'perfect listening bug' and a steam-powered 180-year-old mechanical engine that can solve complex math problems.

A look at the 11,000 year old skill of a deer, a decorated Bronze Age disk and a steampunk lightbulb.

Roman dodecahedrons and baffling copper scrolls discovered in Israel come under the microscope next. Plus, a bizarre discovery in Whitby.

A look at an ancient Greek device built to contain the knowledge of the cosmos and a colour-changing Roman cup.

A tiny metal cube with a connection to Adolf Hitler is studied, along with the 300-year-old Berlin Gold Hat.

Experts examine an ancient tablet could be the key to a lost civilization.

The team investigates some of the most remarkable artefacts from Tutankhamun's tomb, including an exquisite piece of jewellery.

The Enigma Machine, vital to Britain's Second World War effort is re-examined. Mysterious ancient markings on a stone door are discovered.

An obsidian mirror and the notorious Voynich Manuscript are among the magnificent items studied.

Experts investigate the shattered skull of a 19th century railway worker.

See one of the most famous coins ever discovered, and a death mask of a girl who drowned in Paris.

Experts explore a controversial machine designed to measure intelligence.

Experts examine the enigmatic mosaic adorned on the ancient Standard of Ur.

A museum in South London contains a disturbing tattered hat made of brown felt and decorated with more than 80 human teeth; using the latest imaging technology, experts investigate to uncover the macabre origins of this mysterious Victorian-era cap.

Experts investigate the mysterious purpose and identity behind this 9,000-year-old clay-covered artifact.

See one of the world's first batteries. Also, new details emerge about the death of Egypt's infamous Screaming Mummy.

First a mysterious neolithic stone ball, then Pulvermacher's electric chain belt will give you a shock and finally the case of the missing cat - mummy.

Experts explore the only objects ever found in the Great Pyramid of Giza.

A minuscule metal sphere containing two microscopic holes could be the smallest murder weapon in history; experts explore how this tiny object is linked to one of the most bizarre true crime cases of the 20th century.

A 5,000-year-old carved stone object is shaped into four symmetrical lobes covered in unique markings. Why people believed an electrocution device could cure. And a 3,000-year-old cat mummy with no cat inside.

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