Images Dated 26th January 2005

Red Squirrel (Sciurus vulgaris) nibbling on oak buds, Cairngorms National Park, Highlands

Red Squirrel (Sciurus vulgaris) nibbling on oak buds, Cairngorms National Park, Highlands, Scotland, UK, January

© www.naturepl.com

Animal, Animalia, Eurasian Red Squirrel, Europe, Great Britain, Highland, Highlands Of Scotland, Mammal, Mammalia, National Park, Neil Mcintyre, Protected Area, Red Squirrel, Reserve, Rodent, Rodentia, Sciuridae, Sciurus, Sciurus Fuscorubens, Sciurus Nadymensis, Sciurus Subalpinus, Sciurus Talahutky, Sciurus Vulgaris, Scotland, Scotland The Big Picture, Squirrel, Uk, Vertebrate, Western Europe, Wildlife

False-colour SEM of a section of lung tissue

Lung tissue. False-colour scanning electron micrograph (SEM) of a section of lung tissue. The image shows several alveolar ducts and alveolar sacs (large, irregular dark areas) together with a few alveoli (smaller round dark areas). The alveoli are separated by a porous membrane known as the interalveolar septum. The tiny openings in the interalveolar septum are sectioned capillaries and it is in this intricate network of capillaries that the exchange between carbon dioxide and oxygen takes place. Many red blood cells are scattered throughout the frame. Magnification: x110 at 6x7cm size. x170 at 4x5ins

© PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY LA SAPIENZA , ROME/SCIENCE PHOTO LIBRARY

Z particle decay

Z particle decay. "Megatek" computer graphic display of an event from the UA1 detector at CERN, the European particle physics laboratory outside Geneva, showing the decay of a Z particle into two electrons (long white & lilac lines) & some other particles (green). The Z particle, which lives too briefly to be visible itself, was created in a high-energy collision of a proton & antiproton in CERN's Super-Proton-Synchrotron (SPS) collider. The electrically neutral Z is a gauge boson & one of the carriers of the weak force. Its discovery at CERN in 1983 confirmed the "electroweak" theory that unifies the electromagnetic & weak forces. The display outlines the UA1 detector in red. (Run 6059, Event 1010)

© DAVID PARKER/SCIENCE PHOTO LIBRARY