Becton Dickson includes St. Louis-area manufacturing plant in ...
The North American beaver is the largest rodent in North America and the second-largest rodent in the world. The North American beaver is the largest rodent in North America and the second-largest rodent in the world. It is a keystone species in many ecosystems and its dams can create complex wet
There are three types of rock: metamorphic and igneous. Sedimentary rock is made up of fragments of other rocks which have been broken by water, wind or ice. Heat or pressure has changed metamorphic rocks from sedimentary to igneous. Igneous rock is made of lava or magma which has been cooled.