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It took 150 million years for feathered dinosaurs to master flight and become the birds we see overhead today. Now palaeontologists are trying to determine exactly how feathered dinosaurs achieved powered flight and became birds

Feathered dinosaurs have become a well-established fact, thanks largely to a trove of remarkable fossils that were unearthed in northeast China since the mid-1990s.

Each of the seven satellites currently in the Indian Regional Navigation Satellite System (IRNSS) constellation, operationally named NavIC, weighed much less — around 1,425 kg — at liftoff. They all rode the lighter PSLV, ISRO’s workhorse launch rocket.