If you think the man in this photo looks pleasantly chilled and self-confident, think again.
Behind the shades, he has the deepest respect for, and a healthy concern about, the possible presence of polar bears.
‘They're awesome predators,’ he says. ‘11ft 6" long, 4ft tall at the shoulder, 12 foot tall standing upright, 1,001 kilos – one of them would certainly fill your front room.
‘What’s more, they’re smart. They’re big. It’s hard to see them coming. And they can run at 30 mph.
‘You can’t afford to be relaxed around them for one minute.’