he first clear evidence of Bronze Age human activity on Staffa, the dramatic rocky island in Scotland's Inner Hebrides, has been discovered by archaeologists. A single shard of decorated prehistoric pottery was discovered in a small pit on the island in 2016, prompting a more detailed excavation which concluded last week. The team of archaeologists found a burnt grain of hulled barley at the same site, which according to radiocarbon dating originated somewhere between 1880 and 1700 BC. The scientists said the grain -- alongside more fragments of the same type of pottery -- demonstrated that people were "visiting and...