Chemistry
Why Do Onions Make You Cry?
Why do onions make you cry? Learn how cutting creates an eye-irritating sulfur gas, what the eye does next, and which onion tips have real evidence.
Chemistry
Why does cutting an onion sting, and why does ice float? The answers come down to what molecules do when they meet. We follow those reactions step by step, with the sources and the limits of what is known.
Chemistry
Why Does Ice Float?
Why does ice float? Hydrogen bonds lock water into an open crystal that is about 8% less dense than liquid. See the numbers and what it means for lakes.