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 craters Mercury is in many ways similar to the Moon: its surface is heavily cratered and very old; it has no plate tectonics. On the other hand, Mercury is much denser than the Moon (5.43 gm/cm3 vs 3.34). Mercury is the second densest major body in the solar system, after Earth.