Adam Vaughan is a writer.
Within the next two months, an international project will begin off the west coast of India. The hope is that the technology will boost fish populations and tackle climate change at the same time.
The experiment is the first in a wider effort by David King, former chief scientific adviser to the UK government.
Billions of fish can be fed by the blooms of phytoplankton on the ocean surface when whales defecate.
We are having a festival of ideas and experiences. The New Scientist Live event will be held in Manchester, UK, from 12 to 14 March, but you can also enjoy it from your own home.