
The Ocean's Lungs Are Changing: How Underwater Forests Are Being Rebuilt by Robot Hands and Ancient Seeds
The robot dives without hesitation. It is shaped like a torpedo, painted bright orange, and guided by a single onboard camera and a set of inertial sensors. Thirty feet below the surface, in water so cold it aches, the robot reaches its target: a bare rock outcrop on a seafloor that was once a dense, swaying forest of sugar kelp. From a storage bay, the robot releases a small biodegradable disk. The disk contains a young kelp sporophyte, no larger than a grain of rice, attached to a short length of twine. The robot presses the disk against the rock, fires a single biodegradable nail, and moves to the next coordinate. In six hours, it will plant 10,000 of these disks. In three months, if all goes well, the rocks will be covered in golden-brown fronds, and the fish will begin to return.








