Garlic contains a chemical called allin, which is converted into another compound, allicin, when you chew a fresh garlic clove. Allicin is an oily chemical that decomposes very rapidly once it is formed, producing an acidic compound that reacts quickly with free radicals, destroying them.
Mercury is the smallest terrestrial planet in the solar system, about a third of the size of Earth. It has a thin atmosphere, which causes it to swing between burning and freezing temperatures. Mercury is also a dense planet, composed mostly of iron and nickel with an iron core.
Mercury probably doesn't have (much of) an atmosphere because the solar wind would carry it away into space. However, we know very little about Mercury as â¦ yet, and won't until the NASA space probe Messenger gets into orbit around Mercury in 2011 or so. Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.