Michael Pitts / Lake Assal shoreline - Africas lowest point at 515 feet below sea level, Djibouti, , March 2008

Anup Shah / Male Chimpanzee resting on rock 'Pax' {Pan troglodytes schweinfurtheii}, 25-years-old, lowest ranking male of Kasekela community, Gombe NP, Tanzania. 2002

Ashley Cooper / Thermometer at the Furnace Creek Visitor Centre in Death Valley. Death Valley is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does no...

Ashley Cooper / The Furnace Creek Visitor Centre in Death Valley. Death Valley is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does not receive any r...

Ashley Cooper / The Mesquite flat sand dunes in Death Valley. Death Valley is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does not receive any rain...

Ashley Cooper / Sign at 100 feet below sea level in Death Valley. Death Valley is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does not receive any r...

Ashley Cooper / Solar panels in Death Valley. Death Valley is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does not receive any rain at all. October...

Ashley Cooper / Solar panels at the Furnace Creek Visitor Centre in Death Valley. Death Valley is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does n...

Ashley Cooper / Solar panels amongst Badland scenery in Death Valley which is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does not receive any rain...

Ingo Arndt / Arctic Ground Squirrel (Spermophilus parryii) hibernating in it's burrow, University of Fairbanks, Alaska, captive. It's body temperature drop as low as ?2.9 C (26.8 F) the lowest known naturally occu...

Ingo Arndt / Arctic Ground Squirrel (Spermophilus parryii) hibernating in its burrow / University of Fairbanks, Alaska, captive. Its body temperature can drop as low as 2.9 C (26.8 F) the lowest known naturally oc...

Ingo Arndt / Arctic Ground Squirrel (Spermophilus parryii) hibernating in its burrow, University of Fairbanks, Alaska, captive. It's body temperature drop as low as ?2.9 C (26.8 F) the lowest known naturally occur...