![]() The Standard Model Lagrangian is a single equation encapsulating the particles and interactions of. For these theories in particular, among many others, measurements and observations that have been performed to test these theories have been supremely successful.īut as validating as that is - and as powerful as it is to falsify alternatives - it's completely impossible to prove anything in science. ![]() Where their predictions can be described by mathematical expressions, we can tell not only what should happen, but by how much. ![]() So far, these theories have demonstrated themselves to be eminently valid. They have an underlying quantitative framework, enabling us to predict what will happen under a variety of situations, and to then go out and test those predictions empirically. Our best theories, like the aforementioned theory of evolution, the Big Bang theory, and Einstein's General Relativity, cover all of these bases. While everything we observe is consistent with the Big Bang framework, it's not something that can ever be proven. It's the extrapolation back to the earliest times that led to the idea of the Big Bang. ![]() we can see back in time is 13.8 billion years: our estimate for the age of the Universe. If you look farther and farther away, you also look farther and farther into the past. ![]()
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