Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Uri Golman / Helicopter flying over volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24th March 2010. Volcano previously dormant since 1821.

Larry Michael / Autumn colours reflected in river water, Ontonagon River, flows into Lake Superior. Michigan, USA.

Michele Westmorland / Snorkeler swimming with harmless Jellyfish (Mastigias papua etpisonii), Jellyfish Lake, Rock Islands, Palau, Micronesia model released

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Ben Lascelles / The 'Perigree Super-moon'. A supermoon is the coincidence of a full moon with the closest approach the Moon makes to the Earth on its elliptical orbitis resulting in it appearing up to 14% larger and...

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24th March 2010. Volcano previously dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24th March 2010. Volcano previously dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24th March 2010. Volcano previously dormant since 1821.

Patricio Robles Gil / Yasur volcano erupting at night, Tanna Island, Vanuatu Island, South Pacific

Jabruson / Lava flow destroying trees and vegetation as if flows down mountain side, Kimanura volcano, Virunga NP, Democratic Republic of Congo (formerly Zaire)

Grant McDowell / Dust storm preceeding thunderstorm in the Sahel, Mali, West Africa

Grant McDowell / Dust storm preceeding thunderstorm in the Sahel, Mali, West Africa

Jabruson / Lava fountain and subsequent flow from active Kimanura volcano, Virunga NP, Democratic Republic of Congo, formerly Zaire

Grant McDowell / Dust storm preceeding thunderstorm in the Sahel, Mali

Grant McDowell / Dust storm preceeding thunderstorm in the Sahel, Mali

John Cancalosi / Lightning at night, Tucson, Arizona, USA

John Downer / Raining fish - a reconstruction for BBC TV series 'Supernatural' (1999). It is thought that naturally occuring events are caused by fish being lifted by rotating winds, such as tornadoes, dust devils...

Larry Michael / Autumn reflections in river water. USA.

Philippe Clement / Glacial melt water from melting glacier, Gran Paradiso NP, Alps, Italy

Ben Osborne / Stream waterfall over moss with primroses. Scotland, UK

Paul Hobson / Waterfall Peak district, Derbyshire, UK

Larry Michael / Autumn colours reflected in water. USA

Thomas Lazar / Waterfall at Bond Falls, Michigan, USA

Niall Benvie / River North Esk cutting through sandstone conglomerate. Edzell Angus, Scotland, UK

Paul D Stewart / Illustrations of Hyena (Crocuta sp.) jaw bones, 1823 copper engraving of a modern hyena (top) and British prehistoric hyena jawbones (below) from Kirkdale cave (below) with an actual cave hyena (Crocu...