Originally Posted by
666HiddenMaster666
Theory: It's a hypothesis that's been proven an incredible amount of times by different scientists around the world. The evidence that the prediction has always been right is added each time an experiment is performed with regards to the said theory. The scientific community accepts it as a fact unless proven otherwise. The reason they don't change it to a law is because a bunch of people would go nuts (for evolution) or you don't "see" it like gravity.
Big Bang Theory: was a proposal that has lost most of its steam because a new one, String Theory, specifically M Theory, made "better sense"
Theory of Evolution: happens in the present everyday. Every time you are infected by the common cold, it is because they had a mutation or acquired a new gene that allowed them to "bypass" your white blood cells and the immune system's "database," allowing it to run around and wreck havoc before your body goes after it. The process in which the virus mutates or acquire the gene is called evolution. Not only that, Darwin's most famous example, the different Galapagos Finches showed that they each are similar, with slightly different beaks. The reason is because each species has adapted to focus on one type of food source, they don't need the stress of constantly competing with everyone. Finally, looking at fossil records, one is able to see that a "father" species will differentiate into two or more different branches, which shows that some of its owned species evolved so much that they become a new species.
Theory of Special Relativity: always predicts what will happen when one plugs in all the math and work out the answer. All that can be tested on this planet has been tested and all were consistent to the predictions. The reason why it's not a law is because we haven't been able to test on black holes and such. Not only that, if infinity or zero is used as a variable, then it wouldn't work.