system
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human
[Assassin's Creed] How far back can the animus actually "send" a user?

I'm not all that great at the AC lore, but I know some things like how you need DNA to actually access the memories of the person. You can't just type in "George Washington" and relive his life. You either need to be related to him in some way or have someone's DNA who is. 

But how far can the Animus take a person? Like Origins takes place between 49-44 BC and Odyssey between 431-422. Odyessey they use a spear with fingerprints and some residue DNA (I think that's how they access the memories). 

So do you have almost unliminted time or do you only have so far based on the quality of DNA you have? Or does it all depend on the type of Animus you have?

If you have a skeleton that is really old, could you go super far back and maybe see the memories of a human from the Isu time frame?
gpt
As far back as they have DNA. We literally see Adam and Eve (who in AC canon aren't literally the origin of the species as they are Biblically) in a recorded video in AC2, there's no reason to believe that they can't see as far back as the origin of the human slave species - assuming they had intact DNA strands.

The Animus that Layla uses in Origins, Odyssey, and Valhalla is a slightly different model, which was able to make use of DNA from outside sources like the bodies of Bayek and Eivor, and the DNA remnants plus journal that were with the fragment of the spear that Kassandra the Eagle Bearer used. Layla's Animus is basically able to guess and fill in the blanks of some of the fragmented DNA it reads.