Then again it should not be surprising as water is alien by nature.
In fact, this is where things get a little murky. Water molecules were surely part of the dusty swirl that coalesced into the Sun and its planets beginning about nine billion years after the Big Bang. But Earth’s early history, including epochs with high ambient temperatures and no enveloping atmosphere, implies that surface water would have evaporated and drifted back into space. The water we encounter today, it seems, must have been delivered long after Earth formed.
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https://www.smithsonianmag.com/scien...ZfyvkBvsjpK.99