Theory of Everything Is there an end to Physics?

What is a Theory of Everything The unification of General Relativity and Quantum Mechanics The unification of General Relativity and Quantum Mechanics Relationship between the four fundamental forces Relationship between the four fundamental forces Explains properties of fundamental particles Explains properties of fundamental particles

Benefits of a Theory of Everything Simplification of concepts allows deeper understanding Simplification of concepts allows deeper understanding Better understanding of cosmology, black holes, and The Big Bang Better understanding of cosmology, black holes, and The Big Bang Better understanding of time/spacetime Better understanding of time/spacetime

Strongest possibilities for a ToE String Theory/M-Theory String Theory/M-Theory Loop Quantum Gravity Loop Quantum Gravity

String Theory Makes gravity an integral part of the quantum realm-graviton Makes gravity an integral part of the quantum realm-graviton All fundamental particles are string excitations All fundamental particles are string excitations Can involve up to 26 dimensions Can involve up to 26 dimensions Promising because it does away with infinities in calculations (gets rid of the idea of infinitely small particles) Promising because it does away with infinities in calculations (gets rid of the idea of infinitely small particles) Supersymmetry- is there a boson for every fermion and vice-versa Supersymmetry- is there a boson for every fermion and vice-versa

Loop Quantum Gravity Main goal is to quantize gravity Main goal is to quantize gravity Views spacetime as pieces that are connected to each other Views spacetime as pieces that are connected to each other

Difficulties for String Theory Supersymmetry was expected to be discovered by now Supersymmetry was expected to be discovered by now The large number of dimensions are have never been detected The large number of dimensions are have never been detected It doesn’t make any precise predictions It doesn’t make any precise predictions

Weaknesses of a ToE Gödel's Incompleteness Theorem Gödel's Incompleteness Theorem Difficulty Testing Theories Difficulty Testing Theories

Physicists for/against a ToE Einstein Einstein Stephen Hawking- Once believed that it was inevitable now he believes it is improbable Stephen Hawking- Once believed that it was inevitable now he believes it is improbable

Implications for Physicists Would a theory of everything be invigorating/inspiring,or would it take away the thrill of physics Would a theory of everything be invigorating/inspiring,or would it take away the thrill of physics