Mystery of the Hum in Ocean’s Twilight Zone

Deep in the ocean’s twilight zone, scientists have discovered a strange, low-frequency hum—and no one knows exactly what’s causing it. 🌊🐠 This mysterious sound pulses through the water, and it happens every day, right around sunrise and sunset. Some experts think it might be millions of tiny sea creatures moving up and down in the water, like a giant underwater migration. Others believe it could be linked to ocean currents or even unknown marine life communicating in ways we don’t yet understand. Whatever the cause, this eerie hum is unlike anything we’ve ever heard before! Maybe solving this mystery will unlock secrets about the deep sea that we never imagined. 🌊🔍

Credit:
diel migration: By NASA, https://commons.wikimedia.org/w/index...
Planet Earth III / BBC Studios
OBS deployment: By John Whitehead - Ocean Instruments, https://commons.wikimedia.org/w/index...
Utah Rainbow Arch: By BoNoMoJo, CC BY-SA 3.0 https://creativecommons.org/licenses/..., https://commons.wikimedia.org/w/index...
Hydrophone: By Dave Mellinger/Oregon State University - https://flic.kr/p/6p1CyK,
CC BY-SA 2.0 https://creativecommons.org/licenses/..., https://commons.wikimedia.org/w/index...
Underwater-microphone hg: By Hannes Grobe/Alfred Wegener Institute for Polar and Marine Research, CC BY-SA 2.5 https://creativecommons.org/licenses/..., https://commons.wikimedia.org/w/index...
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