Come on in, the water's lovely: The whales wait for Natalia to take the plunge, but the sub-zero waters are enough to kill most people within five minutes
Breathtaking: the scientist uses yoga techniques to hold her breath for up to ten minutes at a time ask she frolics with the whales, Nilma and Matrena
The beauty of nature: Like a scene from a classic pre-Raphaelite painting, naked Natalia Avseenko swims with beluga whales in the Arctic