Nine beaches in Sydney were shut down for visitors on Tuesday after mysterious white and grey marble-sized balls washed up ashore, disrupting the summer holiday season. Popular beaches like Manly ...

An analysis of small grey balls that washed up on ... Jon Beves from the University of New South Wales said the marble-sized balls were mostly made up of saturated fatty acids and calcium. " ...

small marble-like debris has begun washing up on the city's shores again. The balls - this time grey or white in colour - have prompted councils to shut nine beaches, including popular Manly and ...

Nine beaches in Sydney were closed by local authorities last week after white-grey, ball-shaped debris was found washed up along the shore.