Dion Leonard is an extreme marathon racer, and was participating recently in a 155-mile race across the Gobi Desert. For some reason that even he can't explain, a tiny stray dog glommed onto him. And wouldn't leave him, running alongside him...for 77 miles!! One of the main reasons the dog didn't run longer (not that 77 isn't plenty-long enough, though it's of course only half the race) is because at times the temperature got far too hot, and Leonard wouldn't let her. (In the video, he refers to it being 52-degrees, but that's Celcius. In Fahrenheit, that's 125 degrees!)
That's the short-version, here's the story.
And this is a follow-up --