No stopping us now (Image: New Scientist)
EAT your heart out, Duracell bunny: NASA has unveiled an ocean-going robot that really can go on forever. It is the first of its kind to be fuelled entirely by renewable energy.
This month the agency revealed that SOLO-TREC, a wax-filled buoy powered only by the temperature differences in the water around it, has been tirelessly diving to depths of 500 metres off the Hawaiian coast three times a day since November 2009. The float gathers data on temperature and salinity to improve studies of ocean currents.
SOLO-TREC extracts thermal energy from the…
