here that a text of Tacitus from another timeline shows up - somehow. Here, here and here, I suggested how this might have happened. Anderson combines speculation about temporal paradoxes with information about real history. See also here.
In SM Stirling's Emberverse, coyotes, a wolf, a lobo pack and buzzards feast on corpses after a battle. As with members of those same species in our timeline, all that they know is hunger and food. That they are in one of many timelines is entirely beyond their comprehension. Olaf Stapledon's Neptunian narrator remarked that one of the First Men transported to the world of the Last Men would be as unconscious of most of the happenings around him as a cat in London is of finance. Ordinary sense organs cannot detect radio, television or the Internet.
So what might be happening around us now without our knowledge? Of Stirling's characters, Edain recounts his dream conversation with Father Wolf whereas Mathilda receives absolution and communion from Father Ignatius. The deities are our imaginings of superior beings interacting with us - but what is really out there?