"Strange" is not the right word. "False" is. In most mythologies gods are described as immortal. When Cronus eats his children, they stay alive inside of him for centuries until Zeus frees them. You have some reading up to do.I would like to point out that the majority of gods are mortal. However strange that may sound.
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Please do not start this.
It depends on how you define death. Remember that gods are a lot sturdier then humans. And it becomes even more problematic when you have a working afterlife.
To debunk your example, the young Olympians were swallowed whole and as Prometheus showed they would not have needed anything to survive, how could they have died.
I am saying that gods can die trough a unnatural death, they are exempt from sickness and aging by default (depends on the pantheon, some have one but not the other).
And there are indication that Greek gods can be killed:
Pan - dead
Menoetius - killed and banished to Tartarus
Dionysus - ripped to pieces and eaten, but reborn from his heart, does this constitute a death or not? But he may not count as he started as a demigod.
Titans who ate Dionysus - burned to ashes by Zeus' thunderbolts
The general understanding for the death of Greek gods is, that when they die, they go to Tartarus, and can come back later.
But back to the Prophets, we learn that chroniton radiation is uncomfortable, even lethal to them. But how can we be sure, is it not possible that it just "incapacitates" them for a few million years?
On the issue of Sarah, a little timetable can be +/- but just so we can a sense of what happened:
June 2331: Joseph and Sarah meet in New Orleans
August 2331: Joseph and Sarah marry
August 2332: Ben born
August 2333: Sarah disappears
July 2336: Sarah, working as a holo-photographer in Australia, dies in a hovercraft accident
August 2336:Josephs tracks Sarah down
This is all we know about Sarah, I would therefore like to ask some questions to stir up the discussion:
Are the additional information on Sarah's work, living place and the style of her death important? Why did Joseph tell them?
Her working as a holo-photographer, does it mean that she was not an artist? That she did not own a holo-camera? Or that she was not artistic?
Why Australia? Was he trying to escape to a different country, continent, ...?
A hovercraft accident, does it mean, it was a cover-up or a suicide?
Why did it take 3 years to find her? In the 24th century people are found within a day (Neutral Zone comes to mind). Did she change her name, one way or the other? What about her parents, she was still young where are they or what happened to them? Why was Joseph not notified when she died, or was this how he found her? Are we sure it was her, who died and not some look-alike?
Why leave at such "exact" date? She could have left sooner.
Who was in charge vs understanding of emotions. Who ever Sarah was she had to fake good enough to make Joseph fall in love with her.