You would have to account for the fact that the earth is moving around the sun, the sun around the galactic core, and so on. Their time backwards is our time f

You would have to account for the fact that the earth is moving around the sun, the sun around the galactic core, and so on. Their time backwards is our time forwards, but penguins at the south pole, polar bears at the north pole, and all the birds in every tropical jungle near the equator will watch the moon and the stars spin across the sky, as evolutionary eons pass. If we pass through some kind of temporal lens, and at the zero crossing, we come to understand the other side is an equal but opposite negation of ourselves, a look into the temporal mirror still doesn’t unlock the future. We’ll only catch an alternative perspective of now, and we also can’t do much to treat the mirror like furniture. There’s only one arrow of time, and the reflection isn’t separate and distinct just as shadows are anymore separate and distinct from the objects that cast them.