Inside a laboratory nestled above the mist of the forests of South Dakota, scientists are searching for the answer to one of science’s biggest questions: why does our Universe exist?

They are in a race for the answer with a separate team of Japanese scientists – who are several years ahead.

The current theory of how the Universe came into being can’t explain the existence of the planets, stars and galaxies we see around us. Both teams are building detectors that study a sub-atomic particle called a neutrino in the hope of finding answers.

The US-led international collaboration is hoping the answer lies deep underground, in the aptly named Deep Underground Neutrino Experiment (Dune).