New Earth like Planet Discovered

[espritduo]

As far as the human brain goes, it's actual physical makeup is for the most part identical to the brains found in almost every other organism. There's only a tiny, tiny portion that covers the surface of the brain(the neocortex of the cerebral cortex) that makes us any different from our pets. That's it. The rest of the brain below that layer is anatomically almost exactly the same as lesser animals. It's not like our brain is wholly different from an animal's brain. The brain has been evolving steadily for hundreds of millions of years before humans, and our sentience is only the latest development on top of the countless other parts of the brain that have already evolved. It's not very difficult to believe this one little development(which we still don't understand very well) could happen elsewhere, and there is no reason to believe it is something so remarkable, evolution-wise, that it could never happen again anywhere ever in the entire history of the universe.

And there's certainly no reason to think that any one specific environment has anything to do with brain development. The brain is an all-purpose tool that gives a distinct advantage to any organism that has one. It's not like lifeforms living in the desert or under the ocean don't need a brain.

One thing I say and ask to anyone who will answere: "How is it we can tell how old this planet is?"

If you mean the planet Gliese 581c, we can infer its probable age by the age of the star. The star Gliese 581 is a red dwarf star, which is a relatively slow-burning star with a very predictable(and long) lifespan. Based on the type of light it emits we can gauge how much of its hydrogen has been converted into helium, and thus tell how long it's been around burning that hydrogen. Assuming the planet followed what we understand as normal planetary formation, it would have formed from debris around the star a few million years after the star itself formed.