The contents of the 'black balls' that washed up on Sydney, Australia beaches last month have been identified after weeks of analytical testing.

When hundreds of golf ball-sized black balls mysteriously washed onto the beaches of Sydney, it caused enough alarm for the areas to be closed off to the public.

Weeks after sticky black balls washed up on the famed beaches of Sydney, Australia, scientists say they have partly solved the mystery behind the “disgusting” blobs. Initially thought to be tar balls, the golf-ball-size debris turned out to be ...