Iowa dating laws
Threatened or endangered animals in Iowa include the interior least tern, piping plover, Indiana bat, pallid sturgeon, the Iowa Pleistocene land snail, Higgins' eye pearly mussel, and the Topeka shiner.In fact, covered manure storage in modern barns prevent that manure from washing away into surface water, as it does in open lots as snow melts and thunderstorms occur.
The average annual temperature at Des Moines is 50 °F (10 °C); for some locations in the north the figure is under 45 °F (7 °C), while Keokuk, on the Mississippi River, averages 52 °F (11 °C). Spring ushers in the beginning of the severe weather season.
Iowa has a relatively smooth gradient of varying precipitation across the state, with areas in the southeast of the state receiving an average of over 38 inches (97 cm) of rain annually, and the northwest of the state receiving less than 28 inches (71 cm).
The pattern of precipitation across Iowa is seasonal, with more rain falling in the summer months.
When American Indians first arrived in what is now Iowa more than 13,000 years ago, they were hunters and gatherers living in a Pleistocene glacial landscape.
By the time European explorers and traders visited Iowa, American Indians were largely settled farmers with complex economic, social, and political systems. During the Archaic period (10,500–2,800 years ago), American Indians adapted to local environments and ecosystems, slowly becoming more sedentary as populations increased.