The big bang theory tells us that God wasnt the one that created the world, but instead that a big boom that made all the stars and planets in place just in one boom! But this is a theory that mainly scientists like to agree on, but still in my opinion, i dont understand how this is true and real, but hey, its a theory, and thats how it all started with a "BANG".
The right answer is Half-life.
Half-life is the time taken by a substance (molecule, drug or other) to lose half of its pharmacological or physiological activity. Used by extension in the field of radioactivity, the half-life, also called radioactive half-life, is the time at which half of the radioactive nuclei of a source have disintegrated.
<span>The term half-life is often misinterpreted: two half-lives do not correspond to the full life of the product. The half-life is in fact the median of the life of a product, that is to say the duration below which there remains more than 50% of the product, and beyond which there remains less than 50%.</span>
Natural selection - in this case would be one of the fish survives and the one who gets less resources dies, due to the two species fighting for the same resource
