The decorations at this year's Nobel Peace Prize award ceremony come with a special peace message. Every previous laureate has been surrounded by cut-flower arrangements at Oslo City Hall. But this year, all the flora you see are actually potted plants. They all come from the same plant family – bromelias. In nature, many of these plants are epiphytes, living on trees under the canopy of the rainforest, where they thrive on nutrients from dead plant material and the rain that washes over them. I