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While Native American ceremonial mounds can be found in many different locations across the United States, according to nps.gov 'only in northeastern Iowa, along the high bluffs and lowlands of the Upper Mississippi River Valley, have so many of these mounds been found in the shape of animal effigies.'

According to the Mayo Clinic, SAD can be defined as "a type of depression that's related to changes in seasons — SAD begins and ends at about the same times every year."

Temperatures aren't the only thing changing. There's many more transitions to come as we traverse towards autumn.