It was last read by a human 1,800 years ago, when Christianity was regarded a burgeoning cult.Now, scientists have finally deciphered the 'Frankfurt silver inscription' – an 18-line engraving on a thin piece of foil, housed in a protective amulet.Measuring 1.4 inches (3.5cm) long, the 1,800-year-old silver amulet was found with the skeleton of a man at a burial site on the outskirts of Frankfurt, Germany.Researchers have used CT scans to 'digitally unroll' the 'wafer thin' foil and read the inscription within for the first time since the 3rd century AD.Incredibly, the text represents the oldest known evidence of Christianity...