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How magnetic levitation lifts and propels high-speed maglev trains

‘Maglev’ is a portmanteau of ‘magnetic levitation’. Instead of running on wheels, maglev technology uses strong magnetic fields to lift the train and move it forward. Since the train floats above the track, there is no rolling friction during normal operations, nor are operations affected by inclement weather, like rain or snow. The result: the...

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Science Snapshots: July 26, 2026

First ‘exomoon’ found comes with a challenge Using the radial velocity method, astronomers have found a large body orbiting a brown dwarf, CD-35 2722 B, which orbits a star. It is estimated to be 90% as massive as Jupiter and orbiting the brown dwarf every 170 days on an oval path. The find is a...

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As BSF mulls 90-km Sundarbans fence, security clashes with ecology

Just a few months after the Border Security Force (BSF) explored the curious prospect of releasing snakes and crocodiles into rivers at the Indo-Bangladesh border to deter “illegal activities,” the security force has now initiated another controversial feasibility study for a colossal project to safeguard the area. This time, as The Hindu reported, it is...

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How did we identify fossil fuels to be remains of fossils, particularly those of dinosaurs?

— Vivek Keshri, Patna A: Scientists identified fossil fuels to be the remains of ancient life using physical and chemical evidence. Early on, some scientists thought oil was a mineral ‘sweated’ out of the earth’s interior. But in the 16th century, naturalists found imprints of leaves and tree trunks inside coal seams, suggesting that coal...

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India’s rice fields now rank among world’s top methane hotspots

Greenhouse gas (GHG) emissions from paddy fields worldwide have doubled since the 1960s, a new study in NatureFood has found. In the most recent decade, 2011-2020, paddy fields around the world produced around 1.1 billion tonnes of carbon dioxide-equivalent (CO2-e) emissions every year — a 90.4% increase from the annual emissions between 1961 and 1980,...

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