Months after mysterious black balls forced the closure of some of Sydney's most famous beaches, small marble-like debris has begun washing up on the city's shores again. The balls - this time grey ...

The discovery of the marble-sized balls comes just months after a similar incident in October of last year, where thousands of washed-up black balls led to the closure of Bondi Beach, among other ...

Nine beaches, including popular spots Manly and Dee Why, were closed on 14 January after the marble-sized balls started washing up. It came months after thousands of black blobs started appearing ...

Months after mysterious black balls forced the closure of some of Sydney's most famous beaches, small marble-like debris has begun washing up on the city's shores again. The balls - this time grey or ...