A never-ending race to get fitter

• Autores: Bob Holmes
• Localización: New scientist, ISSN 0262-4079, Nº. 2944, 2013, pág. 12
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Holmes features the the longest-running evolutionary experiment carried out in a lab. In 1988, Richard Lenski of Michigan State University in East Lansing began growing 12 cultures of the same strain of Escherichia coli bacteria. The bacteria have been growing ever since, in isolation, on a simple nutrient medium--a total of more than 50,000 generations to date. Every 500 generations, Lenski freezes a sample of each E. coli culture, creating an artificial "fossil record". This allows him to resurrect the past and measure evolutionary progress by comparing how well bacteria compete against each other at different points in the evolutionary process.