Nine beaches in Sydney, Australia, have been closed after mysterious gray debris shaped like small balls washed up ashore. The discovery of the marble-sized balls comes just months after a similar ...

Northern Beaches Council said it was working on safely removing the matter. Most of the samples of the ball-shaped debris were the size of marbles, with some larger, it said in a statement.

In fact, most passengers may not be aware of it at all when they fly. The airline is covering one of its Boeing 787-9 Dreamliners in a riblet-shaped coating and will be the first carrier to fly ...