english: And the reason why they have to go underground is that, if you did this experiment on the surface of the Earth, the same experiment would be swamped by signals that could be created by things like cosmic rays, ambient radio activity, even our own bodies. You might not believe it, but even our own bodies are radioactive enough to disturb this experiment.
non_english: Razlog zbog kojega moraju da idu ispod površine Zemlje je taj, da ukoliko bi pokušali ovaj eksperiment na Zemljinoj površini isti eksperiment bi bio zatrpan signalima koji bi mogli biti uzrokovani, na primer kosmičkim zracima, prirodnom radioaktivnošću, čak i našim telima. Možda nećete verovati, ali čak i naša tela su dovoljno radioaktivna da poremete ovaj eksperiment.