A first-aid kit found on a 2,000-year-old shipwreck has provided a remarkable insight into the medicines concocted by ancient physicians to cure sailors of dysentery and other ailments. A wooden chest discovered on board the vessel contained pills made of ground-up vegetables, herbs and plants such as celery, onions, carrots, cabbage, alfalfa and chestnuts – all ingredients referred to in classical medical texts. The tablets, which were so well sealed that they miraculously survived being under water for more than two millennia, also contain extracts of parsley, nasturtium, radish, yarrow and hibiscus. They were found in 136 tin-lined wooden vials...