If you don't believe that a supernatural force brought into existence all life into its present form, evolution is pretty much your only option to explain the diversity of life. Luckily there s sufficient evidence for evolution that it can easily be accepted as a fact (like gravitation) and np "belief" (in the religious sense) is required.
Ansswer:
In that atheists do not have any common "beliefs" except that there are no gods, they are free to believe in anything they want. As the usual opposite for evolution is creationism, and that belief requires a god, atheists would no believe in it. However alternate theories (panspermia, we're all figures in computerr game like in The Matrix, the rest of you are just figments on my imagination, etc.) the belief in evolution is not a 100% sure thing.
Many Muslims and Orthodox Jews do not " believe " in evolution. Of course the truth does not need you belief to be true and something can be true whether you believe it or not. I should re-word this question. Is there an atheist that doesn't agree with evolution? There may be an atheist that does not agree with evolutionary theory, but what difference would that make? If there was someone out there I would like to hear his views on evolution.
Me, because I am an atheist.
"Because John does not believe in gods, he considers himself an atheist."
Yes (although I'm not sure why you wouldn't), because the definition of atheism is not believing in God, it doesn't refer to evolution at all. Nothing would stop an atheist from believing that Earth was populated by aliens from space, only existed as a program in a massive computer or was the figment of his imagination. Most, however, don't follow these options.
An agnostic is unlikely to believe in hell. An atheist will definitely not believe in hell because belief in hell is as irrational as belief in deities and supernatural beings.
"John is an atheist, which means he does not believe in the existence of any gods or deities."
You are not necessarily an atheist. People who read the Bible literally believe that God started us as humans and made us in his image so we were not monkeys. However, it is also possible to believe that God caused evolution which changed us from apes into the species we are today. Belief and religion should not be limited by one aspect of them. If you have faith you are not an atheist.
yes they did believe in evolution because life begins million years ago
I believe in evolution because we find so many fossils from the past and still no miracle from God has yet happened. I believe in creation because there is way more proof!!
An atheist does not believe in any higher power such as a god. That means an atheist does not argue about religion because they do not have a foundation to argue from. They simply do not believe in a god. A terrorist is defined by horrible actions directed towards someone with a different belief.
Is considered an atheist by the mainstream.
It means you are an atheist. An atheist is someone who does not believe in devils or gods.