Learn Russian: Разве в этой статье нет подробностей о новой сенсации? - Are there really no details about the new sensation in this article?

The particle разве shows doubt or surprise. When paired with a negative word like нет, it usually means the speaker expected the opposite. Here, the speaker is surprised and is essentially asking, 'Wait, aren't there any details? I thought there would be!'

Why is the word for details in the form подробностей?

Because of the word нет (there is no / there are no). In Russian, the thing that is absent or doesn't exist must be in the Genitive case. The nominative plural подробности (details) changes to the Genitive plural подробностей.

What is the singular dictionary form of подробностей, and what is its gender?

The singular form is подробность (a detail). A helpful tip to remember: almost all Russian nouns ending in -ость are feminine, which means they decline like a standard feminine soft-sign noun.

Why does сенсация change to сенсации at the end of the sentence?

The preposition о (about) requires the Prepositional case here. For feminine nouns ending in -ия like сенсация, the Prepositional ending is always -ии, making it о новой сенсации.