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Fisherman Left Baffled by 'Diamond Black Iceberg' Floating Off the Coast of Canada

  • In mid-May 2025, fisherman Hallur Antoniussen captured a photo of an entirely black iceberg located approximately six kilometers away from his fishing vessel in the Labrador Sea.
  • The iceberg's unusual color likely results from dark debris incorporated as glaciers move, with glaciologist Lev Tarasov estimating it to be between 1,000 and 100,000 years old.
  • Antoniussen described the iceberg as almost diamond-shaped and about three times larger than nearby icebergs, while Tarasov noted that 90 percent of an iceberg's mass lies underwater.
  • The photograph went viral on social media, generating widespread interest and speculation on the iceberg’s formation and dark color, with some suggesting soot from ancient volcanic ash or meteorite debris.
  • The sighting highlights natural ocean mysteries and suggests that many such ancient, debris-laden icebergs may exist but remain rarely observed or studied.
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A fisherman on the high seas off the coast of Canada recorded something that few human beings have seen in their lives. Floating serenely among the pale pieces of ice of the Labrador Sea, there was an iceberg that looked as black as the soot. Hallur Antoniussen, aboard the fishing boat Saputi in mid-March [...]

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Science Alert broke the news in Australia on Friday, June 13, 2025.
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