Overview

• Mysterious black balls initially thought to be tar balls were found on Sydney beaches in October.
• Chemical analysis revealed the balls are 'fatbergs,' consisting of human feces, cooking oil, and various chemicals.
• Eight beaches were closed temporarily for cleanup as researchers worked to determine the balls' origins.
• The New South Wales Environmental Protection Authority continues to investigate, but the exact source remains unknown.
• Authorities warn that without identifying the source, similar incidents could occur in the future.