Researchers have succeeded in developing the smallest fully autonomous robot in history. It measures less than 1 millimeter and can swim underwater for months powered only by light.
The water in the Ganga at Triveni Sangam, the river's meeting point with the Yamuna and the holy Saraswati rivers in Uttar Pradesh's Prayagraj, is currently ‘unsafe' for bathing, as it exceeds the ...
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