Australian scientists have solved a mystery which has gripped Sydney: what were the sticky dark blobs which washed up on some of the city's famed beaches last month?Initially believed to be tar balls,

The golf-ball-size debris that led to beach closures across the Australian city was not tar balls as first thought, but was instead made up of decomposed cooking oils, hair and food waste.

Disgusting’ black balls which washed up on multiple Australian beaches have been identified as an odd concoction of substances. Last month, beaches in Sydney were closed as authorities looked into the bizarre black balls which washed onshore.