Images Dated 14th January 2003

Cotopaxi Volcano (5897 meters) & Alpacas (Lama pacos) Highest active volcano in the world

Cotopaxi Volcano (5897 meters) and alpacas (Lama pacos). Highest active volcano in the world, surrounded by Paramo Habitat in Cotopaxi National Park, Andes, Ecuador

© Pete Oxford / DanitaDelimont.com

Active, Andes, Biosphere, Cotopaxi, Ecuador, Highest, Limpopo, Marakele, National Park, Nature, Paramo, Park, Pete Oxford, Private, Reserve, Snow, South America, Volcano, Waterberg, Wild

Actinomma asteracanthion, radiolarian

A glass model of a radiolarian, created by Leopold and Rudolf Blaschka in the late nineteenth century and held at the Natural History Museum, London

© Mary Evans / Natural History Museum

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Water wheel

Water wheel, 19th century design plans. This type is known as a compound water wheel as it uses both the undershot and breast wheel principles. The double-fronted sluice (lower left) simultaneously admits water to the base (undershot) and center (breast wheel), allowing more water to fill each section (cut-away F) thus turning the wheel with a greater force. The volume of water could be adjusted with the mechanism at upper left (K), which could change the flow of water. At this time water wheels were used to grind corn, raise water and power machinery. Taken from "The Circle of the Sciences", published in London 1862-7

© SHEILA TERRY/SCIENCE PHOTO LIBRARY