Somewhere far beneath the surface of the world's seas, in darkness so complete that no sunlight has ever reached it, millions of tiny machines are keeping watch. 

They sit on the ocean floor — patient, silent, indispensable — tracking the tremors that precede tsunamis, measuring temperature shifts that signal climate change, feeding a continuous stream of data to the warning systems that protect hundreds of millions of coastal lives.

Most of them are slowly dying.

Not from pressure. Not from corrosion. From something far more mundane, a drained battery. And when a deep-sea sensor goes dark, getting to it to replace the battery requires a research vessel, a specialised crew, weeks of logistical planning, and enormous expense. 

For every sensor that goes silent, there is a gap in the invisible safety net stretched beneath our oceans. It is one of the quietest, most consequential engineering crises of our time, and almost nobody is talking about it.

Except for a scientist from Kerala’s Kannur, who is not just talking about it but providing a potential solution.

Kerala's moment on the world stage

Dr Bipin Balaram, Associate Professor of Mechanical Engineering at........

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