CBSE class 10 science sample paper 2026 by experts (new pattern): Download PDF with solutions

CBSE Class 10 Science Sample Paper: The CBSE Class 10 Science Board Exam 2026 is scheduled to be held on February 25, 2026, ...
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How did humans develop sharp vision? Lab-grown retinas show likely answer

Humans develop sharp vision during early fetal development thanks to an interplay between a vitamin A derivative and thyroid hormones in the retina, Johns Hopkins University scientists have found.