A scientific discovery

Write in Serbian, in full sentences, about a scientific discovery or theory - real or invented - that interests you. Explain the hypothesis, describe what evidence supports or challenges it, and draw a conclusion. Try to use at least one bare infinitive after an impersonal expression like тешко је or важно је, and at least one aorist form for a single completed moment in the story (for example, the moment the discovery was made). You can write in either alphabet.