It’s not uncommon for fishing boats to see icebergs off the coast of Labrador, Canada. And it’s also not uncommon to see those icebergs carrying some passengers. Normally you’d see some seals lounging on icebergs. So Mallory Harrigan didn’t really think anything of it when she saw something floating on a mushroom-shaped iceberg about 4 miles from shore when she was aboard a crab-fish