New World Encyclopedia integrates facts with values.
Written by online collaboration with certified experts.
Although Michael Faraday received little formal education he became one of the most influential scientists and one of the best experimentalists in the history of science (read more)
Sturgeons are native to subtropical, temperate, and sub-Arctic rivers, lakes and coastlines of Eurasia and North America. Most sturgeons are anadromous bottom-feeders, spawning upstream and feeding in river deltas and estuaries. While some are entirely freshwater, very few venture into the open ocean beyond near coastal areas. Some species reach great size and age, including specimens over 18 feet (5.5 meters) in length and more than 100 years old.
Sturgeons provide important economic, ecological, and aesthetic values. However, because sturgeons mature late in life and have economically valuable eggs, they are particularly vulnerable to exploitation and to other threats, including pollution and habitat fragmentation. Most species of sturgeons are currently considered to be at risk of extinction, making them more critically endangered than any other group of species.
Throughout the war, the British were able to use their naval superiority to capture and occupy coastal cities, but control of the countryside and most of the population largely eluded them. French involvement proved decisive, with a naval battle for control of Chesapeake Bay leading to the surrender of a British army at the Battle of Yorktown, Virginia in 1781. The Treaty of Paris in 1783 recognized the independence of the United States.