Learn French: Le chercheur aurait déterré le squelette d'un roi. - The researcher would have unearthed a king's skeleton.

Yes! This is the journalistic conditional. In French media, the past conditional (aurait déterré) is frequently used to report unverified information, rumors, or allegations. While literally "would have unearthed," a much more natural English translation here would be "reportedly unearthed" or "allegedly unearthed."

How is the past conditional formed in aurait déterré?

It is formed by taking the conditional present of the auxiliary verb—in this case, avoir becomes aurait—and adding the past participle of the main verb, which is déterré.

Is there a trick to remembering the verb déterrer?

Yes, look at the root! It contains the word terre, which means "earth" or "ground." The prefix dé- often indicates reversal or removal, so déterrer literally means to take out of the earth, which perfectly matches the English "to unearth."

Does chercheur just mean anyone who is looking for something?

No. While it comes from the verb chercher (to look for), a chercheur (or chercheuse for a woman) specifically refers to a professional researcher, academic, or scientist. If you are just describing someone who is looking for their lost keys, you wouldn't call them a chercheur.