Paid content is paid for and controlled by an advertiser and produced by the Guardian Labs team. Small changes add up – understanding your carbon footprint can help you focus on the actions that make ...

A storm scattered sand from dunes along the Scottish coast, revealing 2,000-year-old footprints left in the underlying clay. Two citizens made the discovery while walking dogs and quickly called in ...

Ivor Campbell and Jenny Snedden were out walking their dogs on a beach in Scotland in late January when they noticed a series of strange shapes emerging from the damp sand. The markings looked like ...