SENSEX
NIFTY
GOLD
USD/INR

Weather

image 11    C

Science/Tech News

The Hindu News

Science/Tech / The Hindu

details

National Mathematics Day and the double life of Jantar Mantar

The instruments at Jantar Mantar embody the tenet of show, dont tell by making measurements inspectable. Protests, in their best form, have a similar demand

22 Dec 2025 3:34 pm