<span>When the sentence has nothing to do with the paragraph that is written
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Answer:
In other words, it is so old that it is difficult to imagine.
Explanation:
In this case, the simplest answer is the correct one. It's not about math or science; it's just what it is; the history of the universe is very hard to imagine because is humans haven't been in it for very long.
Beowulf's deeds require tremendous courage. Beowulf's deeds require courage, because Beowulf was courageous enough to death with Grendel's mother. And almost of the deeds Beowulf's require courage.
