Since this is a theoretical question, I can theorize an actual possibility for such effect - bending of light by massive objects which results in actually obser

Since this is a theoretical question, I can theorize an actual possibility for such effect - bending of light by massive objects which results in actually observed gravitational lensing (focusing of light from distant object by front objects). If just by pure coincident galaxy clusters (the most massive objects we know) happen to be located just right, light from Earth can bend enough to point back on us. Those clusters are far enough though that we can then "see" on the time scales of Earth forming, so getting to any historical questions or even dinosaurs would actually take some waiting.