<Table> <Tr> <Td> </Td> <Td> This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations . (November 2013) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations . (November 2013) (Learn how and when to remove this template message) </Td> </Tr> <P> In physics, the fundamental interactions, also known as fundamental forces, are the interactions that do not appear to be reducible to more basic interactions . There are four fundamental interactions known to exist: the gravitational and electromagnetic interactions, which produce significant long - range forces whose effects can be seen directly in everyday life, and the strong and weak interactions, which produce forces at minuscule, subatomic distances and govern nuclear interactions . Some scientists speculate that a fifth force might exist, but this is not widely accepted nor proven . </P> <P> Each of the known fundamental interactions can be described mathematically as a field . The gravitational force is attributed to the curvature of spacetime, described by Einstein's general theory of relativity . The other three are discrete quantum fields, and their interactions are mediated by elementary particles described by the Standard Model of particle physics . </P>

What are the four basic forces of nature
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