Frankincense and myrrh, aromatic resins from spindly trees, were once highly prized from Rome to India, and deemed essential for a host of uses ranging from religious to cosmetic to medicinal.

Once it hardens, it is cut from the tree bark. At the height of the Frankincense Trail in the 4th century BC, it was one of the most precious commodities in the world – made immortal ...

Kate Humble makes an epic two thousand mile journey across the Middle East, following the ancient frankincense trade route of Arabia which first connected the Arab world with the West.