The bear whisperer
David Bittner is a biologist and well-known bear photographer. In the Alaskan wilderness he gets closer to these impressive predators than anybody else. (SRF/swissinfo.ch)
David Bittner is a biologist and well-known bear photographer. In the Alaskan wilderness he gets closer to these impressive predators than anybody else. (SRF/swissinfo.ch)
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