What is light? We use it every day, but where does it actually come from? The host suggests doing a little experiment. See if you can follow the instructions in Italian and try it yourself.
The magical Frasassi caves look like something out of a fairy tale, but there's a more scientific explanation.
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Caption 40 [it]: continuava un accumulo incessante di particelle e granuli di calcare. Caption 40 [en]: there was a continuous, incessant accumulation of particles and grains of limestone.
In Italian, there's not only a past participle, as in English, there is also a present participle. Many nouns and adjectives we use every day come from this tense, as well as from the past participle.
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Caption 60 [it]: i combinati e le particelle "ci" e "ne" Caption 60 [en]: the compound [pronouns], and the particles "ci" and "ne"