Louisiana - Spanning nearly 1 million acres, south-central Louisiana's Atchafalaya Basin is the nation's largest river swamp. A distributary of the Mississippi River, the swamp begins near Simmesport and stretches 140 miles south to the Gulf of Mexico.
Answer:
The Orpheus theory, which says that a planet-sized body once collided with Earth and that it sent some of the material into orbit, forming the moon.
