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CBSE board exams 2026 begin on February 17: Smart study tips to score high in class 10 and 12

The Central Board of Secondary Education (CBSE) is set to begin the Class 10 and Class 12 board examinations for the academic ...

Bird retinas function without oxygen—solving a centuries-old biological mystery

Neural tissue normally dies quickly without oxygen. Yet bird retinas—among the most energy-demanding tissues in the animal ...