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At first, scientists thought it might be a new type of underwater earthquake or an ice event. But the sound didn’t behave like normal geological activity. It had a pattern. A rising tone that lasted several seconds. Some researchers even noticed something strange. The acoustic signature looked…

At first, scientists thought it might be a new type of underwater earthquake or an ice event. But the sound didn’t behave like normal geological activity. It had a pattern. A rising tone that lasted several seconds. Some researchers even noticed something strange. The acoustic signature looked similar to sounds produced by marine animals. But there was a problem. To produce a sound that powerful… the creature would need to be larger than any known animal on Earth.