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Story summary
- Iceberg A23a broke away from Antarctica in 1986, covering an area similar to Hong Kong.
- After about 30 years stuck in the Weddell Sea, it moved toward South Georgia via Iceberg Alley.
- Warmer ocean waters have caused A23a to deteriorate into a "mushy" state, accelerating its breakup.
- Experts say the iceberg will soon disappear in the South Atlantic, marking the end of its journey.
