Gum Resin, a natural mixture of gum and resin that is obtained from the leaves and bark of certain plants. Gum resin does not dissolve in water and usually has a strong smell and taste. The resins and oils in a gum resin are more useful than the gum. The oils impart a distinctive odor, and often a color, to other materials. Important gum resins are gum ammoniac, asafetida, frankincense, gamboge, and myrrh. These substances have a variety of uses in medicine and pharmacy and in the manufacture of perfume.
The big bang theory is well-known, but there are many misconceptions about it. Like what? Let's start with this one: There was no bang.
Comets are remarkable pieces of our universe's past, and they tell us a great deal about how the universe was formed. Learn about the long but rewarding process of discovering and analyzing comets.