How do we know there's not life on other planets???

Question

i really need to know these things!!! How do we really know Dinosaurs walked the earth??? maybe somebody made up fossils to fool us!!

Answer 1

To believe that we are the ONLY life in the ENTIRE universe is pretty arrogant. If we exist, why couldn't a totally different civilization, species, or even the same as us exist somewhere billions of lightyears away? There's no way we can be the absolute only ones in a universe full of unanswered questions & unexplored territory we may never see.  

Answer 2

Your right... dinosaurs never existed. Everyone on Earth just wanted to see how long you would fall for it...

Are you serious?! lol. I hope not.

What more proof do you want? Do you want me to get a velociraptor's signature? lol

And who is telling you there is no life on other planets? You need to stop listening to them immediately. Just because we haven't found any life doesn't mean there is none. Mars might have a little, Titan might have some weird forms of life there, Europa and Ceres have liquid oceans of water where we might find all kinds of critters... AND THATS JUST IN OUR SOLAR SYSTEM! There are billions of stars in our galaxy with billions of planets and there are billions of galaxies containing billions more of those stars and planets... Even if life is as rare as a girl at a D&D tournament it is probably out there. When it applied to the vastness of space, chance becomes certainty.

Answer 3

We don't know about life on other planets; of the billions of trillions of planets in the universe, we have only really looked at eight -- and that's a very small sample.  But dinosaurs were real; remains of the beasties have been found all over the world.  

Answer 4

We do not know if there is or is not life on other planets.  That's why we are looking.  We can tell if a planet does not have life (as we know it) if the conditions are not suitable, that is too hot or too cold, or other reasons.

Scientists use a technology called Carbon Dating to tell how old the bones from dinosaurs are.  It's impossible to fake that a bone is millions of years old.  Therefore dinosaurs were real.

Answer 5

There might be life on other planets. They recently discovered water on Mars (the solvent of life). So who knows... maybe not complex forms of life but something as small as bacteria or prokaryotes. Dinosaurs did indeed walk the Earth, and if you can't believe it then don't. What more proof do you need?

Answer 6

I think it is time to relax. We don't know that there isn't life on other planets, and we are EXTREMELY naive to think that we are the ONLY ONES in the great big universe. I think that if someone wanted to fool us, they would do so on something other than a dinosaur. Besides, their existence does not hurt anyone..or any religion....now the existence of Jesus on the other hand......nevermind, I will just leave that one alone.

Answer 7

We don't.

For life on other planets... considering the number of planets there are in the universe (even the galaxy alone), the odds are in favor of life.

As for the dinosaurs? We may never know for sure, but the evidence sure piles up in favor of them.