• Question: Can we find a unified theory of physics?

    Asked by thomas tekashi andrews to Sameed, Jose, Joanna, Heidi, Freya, Chris on 14 Nov 2019.
    • Photo: Joanna Barstow

      Joanna Barstow answered on 14 Nov 2019:

      I think one of the challenges to doing this is the fact that different things start to matter at different scales. For example, across large distances gravity has measurable effects even though it’s actually a relatively weak force, but within an atom the strong nuclear force is the most important (the force that keeps the protons sticking together) and gravity doesn’t matter so much.