Images Dated 28th July 2004

Medeival old town, Sighisoara, Transylvania, Romania

Medeival old town, Sighisoara, Transylvania, Romania
house in medeival town, Sighisoara, Romania, Transylvania

© Russell Young

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Messenger spacecraft at Mercury

Messenger spacecraft at Mercury, computer artwork. The Messenger spacecraft is due to be launched during a 13-day window from 2 August 2004. It will enter orbit around Mercury in March 2011, after first performing three fly-bys of the planet to map its surface and study its composition. The spacecraft is equipped with an array of scientific instruments, and has solar panels (black) for power generation. The 3.6-metre-long boom carries a magnetometer (lower right) that will be used to map Mercury's magnetic field and search for magnetized rocks in the planet's crust. A sunshade (white) protects the spacecraft from the intense heat of the Sun

© NASA/SCIENCE PHOTO LIBRARY

Macrophage engulfs bacteria

Artwork of a macrophage blood cell phagocyting some green, rod-shaped bacteria. Macrophages derive from monocytes (white blood cells) and are long-lived potent phagocytic cells which are able to engulf and digest foreign material. They are present throughout the connective tissue and around the basement membrane of small blood vessels. They are also highly concentrated in the lungs and liver where they filter off foreign material. Once activated, macrophages are able to ingest the bacteria inside their main body where they are destroyed by small particles called lysosomes

© FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY