Three orcas from Alaska surfaced in the waters between Washington state and Canada in March, an area where they've never been documented.
Scientists are scratching their heads over why three mammal-eating orcas turned up in Seattle waters in March, having apparently traveled 1,500 to 2,000 miles (2,400 to 3,200 kilometers) south from Alaska.
"It's extremely rare to have previously undo... [2998 chars]