Cross species transfer of genes has driven evolution
https://phys.org/news/2018-07-species-genes-driven-evolution.html
They have found that cross-species transfers, even between plants and animals, have occurred frequently throughout evolution.
Both of the transposable elements they traced—L1 and BovB—entered mammals as foreign DNA. This is the first time anyone has shown that the L1 element, important in humans, has jumped between species.