Explore Milwaukee County (Click on picture) Milwaukee County, created in 1834 as a territorial county, is derived from a Native American word Mahnawaukee-Seepe meaning gathering place by the river.. Located in southeast Wisconsin, the county seat is Milwaukee.
The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaursâ food supply.
Dinosaurs appeared somewhere between 243 and 231 million years ago. They became extinct around 66 million year ago, when the CretaceousâPaleogene Extinction Event caused the extinction of 75% of all species on Earth. Dinosaurs were alive for between 177 and 165 years.