2. Rome's Secret Weapon

See how a 1,900-year-old battlefield in Scotland is revealing new insights into ancient Rome's military tactics.

3. Underwater Stonehenge

Could a sunken, 9,000-year-old stone circle be the origins of the world's most famous prehistoric monument: Stonehenge?

4. Griffin Warrior

Follow archaeologists as they examine a tomb they hope will reveal the mysterious origins of the ancient Greeks.

5. Riddle of the Roman Skulls

See why the discovery of strangely elongated skulls in an ancient cemetery is giving new insights into the fall of Rome.

6. Murdered Pharaoh

See how the gruesome discovery of a mutilated pharaoh in 2014 has rewritten the history of ancient Egypt.