the theory of relativity is definitely one.
i think another is the theory of gravity is another!
Some examples of moral theories include utilitarianism, deontology, virtue ethics, and ethical egoism. These theories provide frameworks for determining what is morally right or wrong in different situations.
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Pan troglodytes
Equus calabaius
Ornithorhynchus anatinus
Acyrthosiphon lactucae
It is: 1.57*106
evolution,the big bang theory
Varanus Komodensis
Dolphin: Delphinidae Delphis
Two examples of macroeconomists are John Maynard Keynes, known for his theories on government intervention in the economy to manage economic cycles, and Milton Friedman, known for his work on monetarism and advocating for a stable monetary policy.
Lay-theories are theories that aren't scientific but they can be found in expressions and cliches. Examples of lay theories are, "the apple doesn't fall far from the tree," "liquor before beer you're in the clear, beer before liquor never sicker."