NEW YORK EVANSTON — As area Flipside reporter Brian Earl was sitting down to write an article about the impact Hurricane Sandy had on the New York subway system, he was rudely interrupted by a squirrel screeching outside his window. “Hurricane Sandy Ironically Clears Subway Tunnels of Sand,” typed Earl, chuckling to his handsome self, prepared to regale the world with his brilliance. All of a sudden — and mid-word, no less — a squirrel went “MRAAP MRAAP MRAAP!” “How