Taking the temperature of the ocean by measuring the speed of sound waves passing through it: A team of researchers from the California Institute of Technology and the Chinese Academy of Sciences has developed a way to detect changes in ocean temperatures by measuring sound waves generated by underwater...
Source: phys.org
Underwater Community Garden - GreenWave.org
Source: greenwave.org
Expedition Bjurälven: On the Jämtland mountains, a group of spelunkers and cave divers are exploring what proved to be Sweden’s longest underwater cave.
Source: expeditionbjuralven.se