Titanic

Iceberg four times the size of Manhattan works its way into the Arctic Ocean shipping lane. So who cares? Well, just about every oil rig in the Arctic Ocean.

Large enough to threaten Canada's offshore platforms in the Grand Banks off Newfoundland. Wohlleben said iceberg control companies can redirect smaller icebergs, by towing them or spraying them with water cannons.

"I don't think they could do with an iceberg that large," she said. "They would have to physically move the rig."

Fun stuff, huh?