Chemistry is a branch of physical science that studies the composition, structure, properties and change of matter. Chemistry includes topics such as the properties of individual atoms, how atoms form chemical bonds to create chemical compounds, the interactions of substances through intermolecular forces that give matter its general properties, and the interactions between substances through chemical reactions to form different substances.
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Vitamin B3 is an essential part of our diet and if we don't get enough of it we can get nausea, anemia and tiredness and we can get it from such foods as salmon, avocados and nuts. A team of researchers thinks based on analysis of meteorites that it could come from icy dust grains in the depths of space delivered via comets and asteroids. It might even be possible that this vitamin helped speed up the formation of life on Earth and this might give us an insight as to how life may develop on other planets.
Contributed by Sam Feldstone
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