They're tiny, almost undetectable, and may hold the answers to life, the universe and everything

China has launched a new underground detector to find out neutrinos, a tiny particle that can help scientists understand how the universe works.

Looking UP into the sky, what's behind the clouds is the boundless, mysterious universe that we, as humans, still have many questions about.

And in order to figure out how the universe evolved, this group of Chinese scientists decide to look DOWN and go underground.