Tuesday, May 8, 2012

Evolution

Evolution is one of the "big questions". What is evolution? It is the inherited traits to allow a certain species to be better coped with their environment. For instance, polar bears. Their were no such thing until one of the ice ages. The commonly known black bear, started to migrate. They got lost, and ended up somewhere very cold, and stayed. The offspring, over time of course, ended up with white fur, and a much higher tolerance to the cold. Polar bears now populate the colder regions of the world. Darwin conducted experiements on an island using birds. He found dead bird bodies, and noticed that the beaks were all different, but the bodies were more or less the same. He finally stated that the birds belonged to the same species, but had different beaks for different eating habits. Some beaks were used to be able to crack nuts. Some for reaching deep into a flower. Some for easy to access things. These beaks allowed the birds on the different islands to live on their specified island without going hungry. Evolution is only a belief today, but it is possible.