At head of title: DK Smithsonian. "The ultimate visual guide to the discoveries that shaped the world"--Cover. Before science began (2.5 MYA -- 799 C.E.) : Early metallurgy ; The story of the wheel ; ...
Scientists have helped to construct a detailed timeline for bacterial evolution, suggesting some bacteria used oxygen long before evolving the ability to produce it through photosynthesis. University ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results