Greta Thunberg’s face has become one of the symbols of 21st-century upheaval and change, as she helps inspire youngsters to join the green revolution.
But could she have been sent from the past to alter the future?
An unlikely theory... but that has not stopped fans from joking about the teen climate change activist being a time traveller after spotting an uncanny resemblance in a late 19th-century photograph.
