From the Emmy Award-winning team behind Our Great National Parks comes a revealing look at the secret network of connections that unites us all and sustains our planet’s most magical phenomenon: life itself. Narrated by Academy Award-winner Cate Blanchett, this docuseries spans the globe to showcase the extraordinary creatures and ecosystems, great and small, that work together to help restore and sustain Our Living World.
The underwater footage below was filmed by Mark and features in the third episode of Netflix's new wildlife documentary series "Our Living World". Cocos Island, a volcanic island in the eastern tropical Pacific about 500 km southwest of mainland Costa Rica is a known haven for endangered hammerhead sharks, but scientists still aren't sure how and why so many sharks navigate across swathes of ocean to convene there every year. Watch hammerhead sharks swim in 'cyclones' around ancient volcano below:
"We don't really know how these sharks are doing this," Ben Roy, the series producer of Our Living World, told Live Science. "We know that they've got sensors in their heads and we know that these sensors pick up on the magnetic signature of these cool volcanic rocks."
The island formed when lava erupted from an ancient underwater volcano and solidified, until it eventually rose 3,660 meters above the seabed.
The episode followed a young female hammerhead shark as she left her coastal nursery and travelled 300 miles across the Pacific Ocean to the volcanic oasis, where scientists think the sharks assemble to relax, socialize and find a mate. The female instinctively knew the way to Cocos Island thanks to electromagnetic signals emanating from hardened volcanic rocks on the island's slopes.
