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.