Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points) it has been proven by several scientists independently, resulting in its being accepted as truth. it is based on the beliefs and opinions of the majority of the scientific community. it is an observation of the natural world that has been proven as fact. it is the best explanation that scientists can offer, based on many scientific investigations.