Is it wrong for atheists to believe in the existence of anything that has no hard evidence?

Seems a tad hypocritical or selective.

Not only is there no evidence for any god, there is significant evidence and logic to show that gods don't and can't exist.

BTW, there was no carbon present at or immediately after the Big Bang. The multiverse idea is an interesting idea, but we don't know if it's true.

There are thousands of possible gods. Some can be explicitly disproved, if they have explicit characteristics that make them impossible. None can be proved.

There's no reliable evidence for God/Yahweh, Jesus, Allah, Zeus, Thor, or any of the thousands of other gods that people have worshiped. If any of the major gods existed, there would be reliable evidence. There's also extensive evidence that they are all just myths, created to help soothe our fear of death, and perpetuated through religion to subjugate the underclass into obedience.

Science has shown that there's no need for gods to explain the traditional reasons for a god -- origin of the universe, origin of life, origin of species, origin of humans, origin of morality. Science also shows us the psychological reasons that people believe in god(s).

I cannot speak for "all" atheists.

For myself, I can contemplate the possibility of multiple universes, although it has no practical application. I can speculate about the amount of carbon present at the singularity, although it holds no interest for me. I was under the impression that someone had photographed ball lightning, but I will admit that I may have been mistaken, or that the photographs were of something else entirely.

I would not demand that multiverse nor carbon singularity, nor ball lightning be taught as fact, alongside of, or in place of, things which had evidence.

I would hope that the teachers would try any experiment which could prove the hypotheses of anything that was claimed as fact.

I'm an athiest and I don't believe some scientific theories because they're almost as far fetched as religious theories. ex. the big bang theory. I believe in gravity cause the evidence is all around me though. not every athiest believes everything in science, they just aren't going to accept the fact that there is a god because the amount of things wrong with this idea and with religion in general is too long to list.

You really don't understand science. One doesn't believe in a multiverse. The concept of a multiverse is a prospect for study. Maybe some evidence will be forthcomeing, maybe it won't. If evidence is forthcoming, there's more room for study. If there is no evidence, it's time to move on to other ideas that appear worth examining.

First off you've been answering alot of my questions and they are all hilarious. Well I'm no Richard Dawkins but I think Athiests just deny an intelligent designer. The multiverse is not a dedigner but a place. I do not think that it is wrong to belive any of those listed things

No. Thinking about it in the abstract, before you have data you could hypothesize that something exists, or you could hypothesize that it doesn't exist.

If you went looking for supporting data and didn't find any, that should rationally lead you to at least lean toward the "doesn't exist" hypothesis.

For instance, there is nothing hypocritical in my believing that there is a penny under my bed, until I go looking for it and get either confirming or falsifying evidence.

Multiverse theory is a THEORY. Some find it possible, but belief in it isn't anywhere near close to the right word.

Ball lightning has been observed, so yes it exists, we merely don't know what causes it.

You're overusing the word "belief".

You can say something is an interesting hypothesis that deserves further study without going so far as to say you believe in it. I think multiverse theory is likely, but without solid evidence, I can't actually say I believe it yet.

I know the exact amount of carbon present at the singularity: 0%. If you knew anything about science rather than just parroting ideas that you've read elsewhere then you'd know how ridiculous you sound.

No. Atheists disbelieve in a creator deity(or deities), everything else is fair game.

Long before modern science began, many schools of Buddhism disbelieved in a creator deity, but still retained beliefs in reincarnation and karma.