Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.
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Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed ...
Check here the JEE Mains 2025 Chemistry study strategy PDF. Get notes, important chapters for Class 11 and 12, easy and scoring topics, and the full JEE Main syllabus in PDF format.