This reason is enough to delay the Artemis II mission further, says a Mexican nuclear physicist to the Starlust team.

The apostrophe can be used to show who things belong to. If an item belongs to something, the apostrophe shows us who, by sitting at the end of the noun. If that noun doesn't end in s, the apostrophe ...

As we read, we naturally make predictions (guesses) about things like what is going to happen next or what does this word mean. We use clues in what we have already read to make these predictions.