Student Reader

Secondary Products Revolution

Instead of just killing an animal you can harvest wool, harvest milk and more. Stage 1: Animal power (letting animal tow stones, timber, etc). Stage 2: Animal byproducts (milk, and fibers like flax and wool (Linum usitatissimum). The results of this are inventions like the plough.

homeaccount_circle
Secondary Products RevolutionComments
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017