All human irises are brown … except the irises of an albino. Various deactivated genes are responsible for "blue" eyes. They reduce melanin particles to a maximum of 1/400,000,000 of an inch. This reduction creates Tyndall scattering. The shorter blue light rays are reflected back to the ... Read More

Inhaling the vapors of turpentine oil relieves respiratory congestion. It's also rubbed on skin to relieve pain. It's an essential oil used for a wide variety of ailments. You may be eating it and not even know it. Distilled turpentine oil is commonly used as a food flavoring. It's us... Read More