- Dr Manjul Bhargava, Princeton: The first explicit statement of the Pythagorean theorem -- the geometric theorem, occurs about 800 BC in the Shuba Sutra of Baudhayan
- How a 'Made in India' project was scuttled: Instead of the Hindustan Turbo Trainer-40, which HAL could build, export, overhaul, upgrade and even modify into a light-attack aircraft, powerful lobbies have promoted a Swiss trainer
- Electric scooter with battery-swapping:
- All is Forgiven:
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