Scientists know this because on the bodies of washed-up whales, they frequently find huge, round suction scars, emblazoned there by large, grasping tentacles.
Harry saw the gold Gryffindor lion, emblazoned on scarlet; the black badger of Hufflepuff, set against yellow; and the bronze eagle of Ravenclaw, on blue.
“The Chudley Cannons, ” said Ron, pointing at the orange bedspread, which was emblazoned with two giant blackC’s and a speeding cannonball. “Ninth in the league.”