🔷Chewing gum while you cut an onion will help keep you from crying.
🔷A diamond will not dissolve in acid. The only thing that can destroy it is intense heat.
🔷It is estimated that a plastic container can resist decomposition for as long as 50,000 years.
🔷The points of light that you see behind your eyelids when you shut your eyes really hard are called Phosphenes.