[Magazine] Scientific American. Vol. 300. No 3

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54 S c i e n t i f i c A m e r i c a n © 20 09 SCIENTIFIC AMERIC AN, INC. the more challenging a cogni- tive task is, the more new neurons it is likely to rescue, if findings from rodents hold true in humans. ➥ More To Explore Learning Enhances Adult Neurogenesis in the Hippocampal Formation. Elizabeth Gould, Anna Beylin, Patima Tanapat, Alison Reeves and Tracey J. Shors in Nature Neuroscience, Vol. 2, No. 3, pages 260–265; March 1999. Neurogenesis in the Adult Is Involved in the Formation of Trace Memories.

They would be distributed in the field near some factory or refinery and would radio their results back to some collecting point. ” © 20 09 SCIENTIFIC AMERIC AN, INC. March 2009 Shelter Productions (photo); kursten braccHi (prop styling); Anthony Isambert for Halley Resources (grooming) A single carbon nanotube can function as a radio that detects and plays songs BY ED REGIS w w w. S c i A m . c o m  © 20 09 SCIENTIFIC AMERIC AN, INC. S CIENTIFIC A MERIC A N 41 [good vibrations] Anatomy of the Tiniest Radio Just one nanotube can perform all the functions of a standard radio with many parts.

Biologists had long believed that this talent for neurogenesis was reserved for young, developing minds and was lost with age. But in the early part of the decade Elizabeth Gould, then at the Rockefeller University, demonstrated that new cells arise in the adult brain —particularly in a region called the hippocampus, which is involved in learning and memory. S. and Sweden had shown that neurogenesis also occurs in humans [see “New Nerve Cells for the Adult Brain,” by Gerd Kempermann and Fred H.

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