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Monday, February 23, 2026
TopicThe Great Trigonometrical Survey of India

Topic: The Great Trigonometrical Survey of India

Chennai vs Bengaluru—where did the Great Trigonometrical Survey of India begin?

Ananthapathmanabhan -
The British wanted to understand the length and breadth of the Indian peninsula. The answer was a 100-year-long survey that used triangulation to map vast distances.

Trigonometry may be schooltime misery, but it’s what first helped us see India right

Abhinav Srinivasan -
Here's how trigonometry helped India's colonial rulers draw up the subcontinent's first map in the 19th century.

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Opinion

Nick Jonas wearing a mangalsutra is validation for many Indians. He’s our favourite jiju

Stela Dey -
Nick Jonas is not trying to modernise the mangalsutra, but his gesture shows that choices can be equal. If commitment must be flaunted, it need not be gendered.

Patel’s 1950 letter to Nehru: Find no legal power to deal with Press or men like Syama Prasad

Everyone’s ‘damaged’ in modern dating. Love will soon be called a mental illness

Economy

In the West, there’s anxiety. In India, optimism—Rishi Sunak says India poised to be leader in AI

Vrinda Tulsian -
On Wednesday, the former UK Prime Minister Rishi Sunak was speaking in New Delhi at a Carnegie & Observer Research Foundation event on AI.

Defence

Suspected brake failure leads to Tejas accident after landing, airframe likely to be written off

Snehesh Alex Philip -
The IAF, so far, remains mum on this accident which has led to grounding of the fleet for safety checks.

National Interest

No country is ever fully sovereign. Cold War era taught India its real meaning

Shekhar Gupta -
India’s fraught neighbourhood places multiple constraints on its strategic choices. It leaves no time to take a deep breath, lean back and reset.

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