Diseases of the Heart Structure, Muscle and Valves The normal heart is very robust. Some people are born...
Portraits of Native Americans from Pocahontas to Sitting Bull From 1600 – 1850, artists in England and, later, in...
The Medieval Agricultural Revolution: New evidence During the medieval ‘agricultural revolution’, new forms of cereal farming...
Microbial Record-Breakers Microbes hold astonishing speed records: the remarkable Thiovulum majus races...