Would it be cool if a natural space bridge connected Earth with Mars in the past?

That is “possible” only if Earth and Mars traveled in a parallel way, which I don’t think happens.

Sure. And a pet unicorn would be cool too.

I don’t believe wormhole existence or stability are understood well enough to sink this ship.
Yes, it would be cool, but I can imagine some other link ups which would excite me more.
Red, dear, reach further, and tell me where wormholes could lead that would be REALLY cool.

Even cooler if it connected in the present. We could send them all back again.

Way cool, but we need a way of explaining why all lifeforms are genetically related. What do you think of this? The great flood mentioned in the Bible really occurred on Mars. Noah’s Ark was a giant space shuttle used to carry the plants and animals to Earth through the wormhole created by God for just this purpose.