Animal genetic resources for food and agriculture crop and livestock species in the early neolithic time period changed our human evolution and lifestyles. This ability to control food production led to major demographic, technological, political and military changes. Consecutively, thousands of years of natural and human selection, genetic drift, inbreeding, and crossbreeding have contributed to the diversification of animal genetic resources and increased the variety of environments and production systems that livestock keeping takes place. Relatively few species have been domesticated; out of the world's 148 non-carnivorous species weighing more than 45 kg, only 15 have been successfully domesticated. The proportion of domesticated birds used for food
Catcher pouch train's catcher arm, he might miss the catcher pouch altogether. In the United Kingdom as early as 1855 an apparatus for snatching mailbags on-the-fly and delivering mail without stopping a train was in use at Slough, England. It continued in service until 1939. Catcher pouches could not be used for any other purpose. The catcher pouch was to be used only for letters (sometimes newspapers were an exception). The maximum weight of a filled catcher pouch was to be 50 pounds. The catcher pouch was to be locked and placed upside down on the mail crane no sooner than 10