Final answer:
New theories in cosmology often extend existing theories rather than replacing them. A theory in science is a general statement that explains numerous observations. When new data contradict existing theories, scientists develop new insights and deepen their understanding.
Step-by-step explanation:
In the field of cosmology, it is not uncommon for new theories to be developed to account for new information, rather than completely replacing existing theories. For example, Einstein's theory of relativity extended Newton's theory of mechanics rather than replacing it. Similarly, the Big Bang theory did not replace previous theories of the universe but provided a new explanation for its origins.
A theory in science is a general statement that explains a large number of observations. It is built on the foundation of older theories and supported by evidence. Theories indicate a high level of confidence in their correctness.
When new data contradict existing theories, scientists are forced to rethink their position and develop new insights. This process often leads to deeper understanding of the way nature works.