A mountaineer from Gloucestershire believes he may have come across the footprints of a yeti-like beast while trekking in the Himalayas.
Steve Berry has been exploring the mountains since the late seventies and in that time has found these mystery tracks twice. This video was taken on his last two visits:
The prints are very linear - one foot in front of the other - which Mr Berry says marks them apart from the wildlife you'd expect to find in the area.
Steve runs an adventure holiday company. Based on that, he says he is met with a "lots" of skepticism.
Locals say the prints were on a slope which has never been explored by man.
Ian Redmond is an expert in mountain gorillas. ITV News showed him the photographs at his home in Stroud.
Click to hear what he makes of them:
For decades there have been numerous mystery footprint sightings - many expeditions have been staged to find a yeti - but none have ever found proof of it.
Steve Berry is a long way off getting solid evidence - but hopes to return to Butan this autumn to keep looking.
But are you convinced? Take our poll:
You can watch the full report below: