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Home > Science Photo Library > Images Dated > 2014 > January > 25 Jan 2014

Images Dated 25th January 2014

Available as Framed Prints, Photos, Wall Art and Gift Items

Choose from 1,078 pictures in our Images Dated 25th January 2014 collection for your Wall Art or Photo Gift. Popular choices include Framed Prints, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery. We are proud to offer this selection in partnership with Science Photo Library.


Tungsten carbide slip gauge blocks Featured 25 Jan 2014 Print

Tungsten carbide slip gauge blocks

Tungsten carbide slip gauge blocks. These are used as a standard form of length measurement. They are precision ground (lapped) to a specific thickness and then stacked to create the required length. The instructions inside the lid of the box refer to wringing, the process of placing two or more gauge blocks together so that the ultra-flat surfaces adhere to each other. A series of such wrung blocks will support their own weight. Photographed at the National Physical Laboratory, Teddington, UK

© NATIONAL PHYSICAL LABORATORY CROWN COPYRIGHT/SCIENCE PHOTO LIBRARY

Nervous system cells, artwork Featured 25 Jan 2014 Print

Nervous system cells, artwork

Nervous system cells. Computer artwork showing neurons (nerve cells, purple), astrocytes (green) and a blood vessel (along right). Neurons are responsible for passing information around the central nervous system (CNS) and from the CNS to the rest of the body. Each nerve cell comprises a body surrounded by numerous extensions called dendrites, which collect information from other nerve cells or from sensory cells. Each neuron also has one process called an axon, which passes information to other nerve cells, or to effector cells such as muscle fibres. The axons appear segmented as they are surrounded by a myelin sheath. Astrocytes provide support for the neurons. They surround and regulate synapses and supply neurons with nutrients

© TIM VERNON / SCIENCE PHOTO LIBRARY

Extraction of fossil DNA Featured 25 Jan 2014 Print

Extraction of fossil DNA

Extraction of fossil DNA (deoxyribonucleic acid). Material drilled from a fossilised Homo heidelbergensis femur (thigh) bone (femur 13) found at the Sima de los Huesos site, Sierra de Atapuerca, Spain. The mitochondrial DNA was extracted and sequenced. The fossil is over 400, 000 years old, making it the oldest human DNA sequence published to date (December 2013). It showed that H. heidelbergensis was more closely related to the Denisovans, an eastern Eurasian hominin, than to Neanderthals. The work was carried out in a collaboration between Centro Mixto de Evolucion y Comportamiento Humanos, Madrid, Spain, directed by Prof. Juan Luis Arsuaga and Svante Paabo's department of genetics, Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany

© JAVIER TRUEBA/MSF/SCIENCE PHOTO LIBRARY