Thousands of mysterious objects land on shore BY STEVE JUSSEAUME sjusseaume@seacoastonline.com HAMPTON - Maritime tumbleweed? Whelk egg cases? Plastic fishing line? Extraterrestrial seed pods? Natural cleansers? Everyone has a theory over the tens of thousands of round Brillo pad-like balls washed up with the incoming tide last weekend along the coast off Hampton. What they exactly are has caused a debate among beach-goers, marine scientists and casual viewers alike this week. The soft, spongy balls, the size of golf or tennis balls, appeared with the incoming tide along a 300-yard stretch of sandy beach beginning at Northside Beach, just north...