Bryan and Cherry Alexander / Rainbow over herders' tent in Todzhu. Republic of Tuva, Siberia, Russia, 1998.

Bryan and Cherry Alexander / Dolgan reindeer / caribou herder carrying block of ice to be used for drinking water. Taymyr, Northern Siberia, Russia, 2004.

Nigel Marven / Talan Is, Kamchatka, Siberia, Russia

Bryan and Cherry Alexander / Chukchi herder iced up at -30 C during winter. Chukotskiy Peninsula, Chukotka, Siberia, Russia, spring 2010

Bryan and Cherry Alexander / Elderly Yupik Eskimo woman speaking into mobile phone during conference with native Eskimos in Alaska. Provideniya, Chukotka, Siberia, Russia, 2010

Bryan and Cherry Alexander / Dolgan reindeer / caribou herder using plane to make 'hooray' (pole for driving reindeer). Taymyr, Northern Siberia, Russia, 2004.

Bryan and Cherry Alexander / Bathers on banks of Yenisei River at Kyzyl. Republic of Tuva, Siberia, Russia, 1998.

Bryan and Cherry Alexander / Goat herder's Yurt, Republic of Tuva, Siberia, Russia, 1998.

Bryan and Cherry Alexander / Statue of Lenin in Petropavlovsk, surrounded by autumn colour. Kamchatka, Siberia, Russia, 1999. Editorial use only.

Bryan and Cherry Alexander / Low winter sun shining on pressure ice near Cape Dezhnev. Chukotka, Siberia, Russia.

Bryan and Cherry Alexander / Woman fishing on Sorug River flowing through Azas National Reserve in the Republic of Tuva. Siberia, Russia, 1998.

Bryan and Cherry Alexander / Chukchi men playing traditional lasso game in Chukotka, Siberia, Russia, 1994.

Igor Shpilenok / The Geyser River flows through the Valley of the Geysers, cloaked in autumn colours, Kronotsky Zapovednik, Kamchatka, Far East Russia

Igor Shpilenok / Autumn colours of the Ermans Birch trees in the Valley of Geysers, Kronotsky Zapovednik, Kamchatka, Far East Russia

John Cancalosi / Amphibious vehicle in river, Ural mountains, Siberia, Russia

John Cancalosi / Mansi women in traditional dress, Siberia, Russia

John Cancalosi / Idigenous Mansi villagers in traditional dress, near Ural Mountains, Siberia, Russia

Nigel Marven / Large waterfall flowing in the summer, Kamchatka, Russia

Nigel Marven / Geysers in Geyser valley, Kamchatka, Russia

Nigel Marven / Looking down into volcanic crater with turquoise crater lake and steep slopes with snow at the top, Kamchatka, Russia