* Prodigies which happen to be good in a field related to what their parents are good at. Often the wording used indicates a memory-like reason. For example, finding the rules of chess "familiar."
* Embeddings in machine learning, which allow encoding of high-dimensional information in a low-dimensional space. This would imply that humans have a somewhat-shared embedding space at some "layers". It's interesting to wonder how similar this space would be across various animals, as it would effectively be an evolved language.
* Other more subtle things, like the "cultural memory" of a society.
One question would be what types of time scales these memories survive across. Maybe some forms of instinct are deep memories that have been directly encoded in DNA.