It was as cold as ice in Michigan this week. Literally. Weather elements aligned over the past several days to create not one, but two, rare phenomena on the shores of Lake Michigan. People woke up to reports that thousands of ice balls had washed up at Holland State Park in Michigan. The Park shared images of the shoreline covered in &ldquoice balls&rdquo due to a polar blast which sent temperatures plummeting. These boulder-sized balls are an annual phenomenon. They form when chunks break off from sheets of ice covering the lake, and the churning waves form the pieces into balls. The size of these vary from smaller softball-proportioned ones, to some that are as big as yoga balls.