Eric Baccega / Buriat shaman plays tambourine on Olkhon Island, Baikal lake, Siberia, Russia, June 2000

Mark Brownlow / Rebreather instructor Ian Thomas and cameraman Didier Noirot prepare to dive under the ice, Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia. BBC Plane...

Mark Brownlow / Looking down on frozen surface of Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia. BBC Planet Earth series, April 2005

Mark Brownlow / Mark Brownlow, producer of Freshwater programme for BBC Planet Earth series, behind ice sheet, on location at Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia,...

Konrad Wothe / Pasque Flower (Pulsatilla sp) on hillside beneath shining sun, Barakchin Island, Lake Baikal, Russia

Konstantin Mikhailov / Chivyrkuyisky Bay, Zabaikalsky NP, Lake Baikal, Russia.

Konrad Wothe / Baikal Seal (Phoca sibirica) resting on rock, Zabaikalsky National Park, Ushkany Islands, Lake Baikal, Russia

Konrad Wothe / Baikal Seal (Phoca sibirica) resting on rock with flipper raised, Zabaikalsky National Park, Ushkany Islands, Lake Baikal, Russia

Doug Allan / Cape Burchan, Lake Baikal, Russia.

Konrad Wothe / Baikal Seal (Phoca sibirica), Lake Baikal, Zabaikalsky National Park, Russia

Doug Allan / Cameraman Doug Allan filming seals with white sail for camouflage, Lake Baikal, Siberia, Russia, April 1989. Freeze Frame book plate page, 48.

Doug Allan / Baikal Seal (Pusa sibirica) emerging from hole in the lake ice. Lake Baikal, Siberia, Russia. Freeze frame book plate page page 49.

Doug Allan / Doug Allan diving underwater observing antiquarian sponges, Lake Baikal, Siberia, Russia, March, Freeze Frame book plate page 49

Doug Allan / Cameraman Doug Allan on location in Lake Baikal, Siberia, with seal hunter and motorbike with sidecar pulling sledge. April 1989, Cover image of Freeze Frame

Konstantin Mikhailov / Baikal seal (Phoca sibirica) the only freshwater seal in the world, Baikal Lake, Russia

Eric Baccega / Hands of a buriat shaman, showing deformity of two thumbs on right hand, Olhkon Island, Baikal lake, Siberia, Russia, June 2000

Eric Baccega / Buriat shaman plays tambourine on Olkhon Island, Baikal lake, Siberia, Russia, June 2000

Eric Baccega / Ouzour village, weather station, in spring. Olhkon Island, Baikal lake, Siberia, Russia, June 2000

Eric Baccega / Fisherman catching a fish with a net, Baikal lake, Siberia, Russia, June 2000

Eric Baccega / Shaman rocks and Buriat religious symbol, Olhkon Island Baikal lake, Siberia, Rusia, June 2000

Mark Brownlow / Rebreather instructor Ian Thomas and cameraman Didier Noirot prepare to dive and film under the ice, Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia. B...

Mark Brownlow / Film crew digging hole in ice for cameramen to dive in Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia on location for BBC Planet Earth series, April 2...

Doug Allan / Cameraman, Doug Allan, with seal hunter in motorbike with sidecar, on Lake Baikal, Siberia, Russia, April 1989. Freeze Frame book plate, front cover.

Konstantin Mikhailov / Baikal seals {Pusa sibirica} hauled up on shore, Lake Baikal, Siberia, Russia

Doug Allan / Baikal seals {Pusa sibirica} several on haul out on a small rock, Ushkanyi Is, Lake Baikal, Siberia, Russia

Doug Allan / Baikal seal {Pusa sibirica} one hauled out on rock, others in the water, Ushkanyi islands, Lake Baikal, Siberia, Russia

Kerstin Hinze / Grey-bellied / Baikal Bullfinch (Pyrrhula pyrrhula griseiventris) with a maple seed in its beak, Lake Kussharo, Hokkaido, Japan February 2007

Doug Allan / Doug Allan with camouflage gear filming seals on Lake Baikal, Siberia, at -20 degrees C.

Willem Kolvoort / Stone bottom of Lake Baikal, world's oldest, largest and deepest freshwater lake, Siberia, Russia

Willem Kolvoort / Gammarid isopod {Acanthogammarus victorii) endemic to Lake Baikal, Russia

Willem Kolvoort / Gammarid isopod {Eulimnogammarus sp} endemic to Lake Baikal, Russia

Willem Kolvoort / {Brandtia parasitica} Gammarid amphipod endemic to Lake Baikal, always living on sponge, Lake Baikal, Russia

Willem Kolvoort / Gammarid isopod {Acanthogammarus victorii) endemic to Lake Baikal, Russia

Willem Kolvoort / {Brandtia parasitica} Gammarid amphipod endemic to Lake Baikal, always living on sponge, Lake Baikal, Russia

Willem Kolvoort / Stone bottom of Lake Baikal, world's oldest, largest and deepest freshwater lake, Siberia, Russia

Willem Kolvoort / Stone bottom of Lake Baikal, world's oldest, largest and deepest freshwater lake, Siberia, Russia

Willem Kolvoort / Gammarid isopod {Acanthogammarus victorii) endemic to Lake Baikal, Russia

Willem Kolvoort / Gammarid isopod {Acanthogammarus victorii) endemic to Lake Baikal, Russia

Willem Kolvoort / {Brandtia parasitica} Gammarid amphipod endemic to Lake Baikal, always living on sponge, Lake Baikal, Russia

Willem Kolvoort / {Pallasea cancellus} Gammarid isopod endemic to Lake Baikal, Russia

Willem Kolvoort / Shoreline of Lake Baikal, world's largest, oldest and deepest freshwater lake, Siberia, Russia

Willem Kolvoort / Gammarid isopod {Eulimnogammarus sp} endemic to Lake Baikal, Russia

Konstantin Mikhailov / Grassy marshes in the mouth of Chivyrkuy river at east shore of Baikal Lake, Zabaikalskiy National Park, Siberia, Russia

Konstantin Mikhailov / Sunset over Chivyrkuyskiy Bay, east shore of Baikal Lake, Zabaikalskiy National Park, Siberia, Russia

Konstantin Mikhailov / Famous cliff “Shamanka” in Ol'khon Island of Baikal Lake, Pribaikalsky NP, Russia.

Konstantin Mikhailov / Larch forest of E Siberia with Dahurian Larch (Larix gemelinii) on the shores of Baikal Lake, Siberia, Russia

Konstantin Mikhailov / {Polygonum aviculare} flowering, Lake Baikal, Siberia, Russia

Mark Brownlow / Local man showing the traditional winter way to fish for food through hole in ice in Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia. BBC Planet Earth...

Mark Brownlow / Film crew digging hole in ice for cameramen to dive in Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia on location for BBC Planet Earth series, April...

Mark Brownlow / Local men preparing planks to use as bridge across cracking ice plate, a mile out from shoreline of Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia BB...

Mark Brownlow / Local men preparing planks to use as bridge across cracking ice plate, 1 mile out from shoreline of Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia BB...

Willem Kolvoort / Tadpole shrimp {Lepidurus sp} Lake Baikal, Siberia.

Willem Kolvoort / Tadpole shrimp {Lepidurus sp} Lake Baikal, Siberia.

Konstantin Mikhailov / East shore landscape of Baikal Lake, Svyatoy Nos Peninsular, Russia, largest freshwater lake in the world

Konstantin Mikhailov / Larch taiga landscape of east Siberian type on the western shore of Lake Baikal, Russia. The beginning of Lena River, Baikalo-Lenskiy Zapovednik / reserve.

Igor Shpilenok / A banya / bathhouse on the shore of Lake Baikal, Baikalo-Lensky Zapovednik, Russia.

Igor Shpilenok / Upper Lena plateau in the mountains above Lake Baikal. Russia. Baikalo-Lensky Zapovednik, Russia.

Igor Shpilenok / Reindeer moss {Cladonia rangiferina} growing by stream above Lake Baikal, Russia.

Igor Shpilenok / Ranger and weather stations on the coast of Lake Baikal on Pokoiny (Calm) Cape, Russia.

Konrad Wothe / White marble Sagan-Zaba cliff along shoreline of Lake Baikal showing darker cherry (Black) cliff behind, Pribaikalsky State National Park, Russia

Eric Baccega / Fishing boat at dawn / dusk, Lake Baikal, Siberia, Russia

Konrad Wothe / Yellow-wing Sculpin (Cottocomephorus grewingki), Lake Baikal, Russia

Konrad Wothe / Yellow-wing Sculpin (Cottocomephorus grewingki), Lake Baikal, Russia

Konrad Wothe / Amphipod (Eucarinogammarus sp) on rocky lake bed, Lake Baikal, Russia

Konrad Wothe / Rocky beaches along the coast of Holy Nose Peninsula, Lake Baikal, Russia

Konrad Wothe / Red rocks cliffs along shoreline, Lake Baikal, Russia

Konrad Wothe / Rocky beaches along the coast of Holy Nose Peninsula, Lake Baikal, Russia

Konrad Wothe / Rocky shoreline, Barakchin Island, Lake Baikal, Russia

Konrad Wothe / Sponge (Lubomirskia baicalensis) underwater, Lake Baikal, Russia

Konrad Wothe / Sponge (Lubomirskia baicalensis) growing on rocky lake bed, Lake Baikal, Russia

Konrad Wothe / Red-breasted Merganser (Mergus serrator) female, Lake Baikal, Russia

Eric Baccega / Dr Maksimov at the Bolshoy Kotu laboratory, Lake Baikal, Siberia, Russia

Eric Baccega / Woman outside wooden house, Rougir village, Olhkon Is, Lake Baikal, Siberia, Russia

Eric Baccega / Dr Maksimov at the Bolshoy Kotu laboratory, Lake Baikal, Siberia, Russia

Eric Baccega / Fishing boats at harbour, Lake Baikal, Siberia, Russia

Eric Baccega / Woman sitting outside wooden house, Rougir village, Olhkon Is, Lake Baikal, Siberia, Russia

Eric Baccega / Two women sitting beside pile of timber, Lake Baikal, Siberia, Russia

Eric Baccega / Local man, Lake Baikal, Siberia, Russia

Doug Allan / Cameraman Doug Allan using blind on sledge to approach seals, Lake Baikal, Siberia

Doug Allan / Cameraman Doug Allan in motorbike sidecar with Russian guide. Lake Baikal, Siberia

Eric Baccega / Inside fishing tent over ice hole on Lake Baikal, Siberia, Russia

Eric Baccega / Fisherman at ice holes on Lake Baikal, Siberia, Russia

Eric Baccega / Industrial site beside Lake Baikal, Siberia, Russia

Eric Baccega / Fish catch of fisherman with tent over ice hole on Lake Baikal, Siberia, Russia

Eric Baccega / Local man beside trees tied with cloth, Shamanism religion, Lake Baikal, Siberia, Russia

Eric Baccega / Fisherman bathing in wooden washtub beside Lake Baikal, Siberia, Russia

Eric Baccega / Fisherman with tent over ice hole on Lake Baikal, Siberia, Russia

Eric Baccega / Lake Baikal, Siberia, Russia

Eric Baccega / Lake Baikal in summer with Baykalskiy mountains behind, Siberia, Russia

Eric Baccega / Fishing huts + men fishing through ice on Lake Baikal, Siberia, Russia

Eric Baccega / Fisherman fishing through ice on Lake Baikal, Siberia, Russia

Eric Baccega / Lorry driving across frozen ice of Lake Baikal in winter, Siberia, Russia

Eric Baccega / Fishing huts on shores of Lake Baikal in winter, Siberia, Russi

Eric Baccega / Fisherman with tent over ice hole on Lake Baikal, Siberia, Russia

Eric Baccega / Fishermen at ice holes on Lake Baikal, Siberia, Russia

Eric Baccega / Baikal seals hauled out on rock {Pusa sibirica} Lake Baikal, Siberia, Russia