Conspiracy theorists are claiming that Greta Thunberg is a time traveller.

Bizarre on Female First

Bizarre on Female First

An image from 1898 found at the University of Washington of a young female who looks like the doppelgänger of the teen Swedish climate change activist has led to some theorists suggesting she has been sent from the future ''to save us''.

One tweeted: ''I'm not one for conspiracy theories but she is 100 per cent a time traveller.''

Another added: ''Maybe she is from the future and was sent back in time to key moments in history to stop climate change.''

A third said: ''What it is, right, is that actually she's a time traveller, and she's come to warn us about the future. It's the only explanation.''