Eerie Perfect Circles Discovered on Ocean Floor Leave Scientists Baffled

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00:00Eerie perfect circles discovered on ocean floor leaves scientists baffled.

00:05The ocean floor remains a mystery, with more known about Mars than our seas.

00:10In 2011, marine biologist Christine Pergent-Martini's expedition near Corsica

00:16revealed perfect circles on the Mediterranean seafloor, 400 feet deep.

00:22These patterns seemingly unnatural, excited scientists.

00:26Initial scans showed dozens, but further surveys uncovered over 1,300 formations

00:31across six square miles, sparking intrigue about their origins and formation processes.

00:39With each circle measuring 67 feet wide and featuring dark centers,

00:44these formations defied natural patterns.

00:48Bomb craters and geological processes were ruled out due to their uniformity.

00:51The enigma sparked scientific interest and dramatic theories surfaced,

00:56including human intervention, unusual underwater phenomena, and even alien origins.

01:05The Pergents, experts in seagrass ecosystems, suspected coralline algae might form these circles,

01:11but conformation needed direct observation.

01:15Diving to 400 feet is challenging beyond normal scuba limits.

01:18National Geographic photographer Laurent Balesta led a team of expert divers in 2020

01:24to examine the circles firsthand, using specialized equipment for extended time at dangerous depths,

01:31carrying lights and cameras to document their findings.

01:37Balesta's team found a thriving ecosystem around the rings,

01:41featuring rare yellow coral Dendrophilia cornegara, usually deeper in the ocean.

01:46Pergent Martini noted their ecological value as biodiversity islands,

01:51offering protection and resources for diverse species in an otherwise barren seafloor.