Mike, "His premise bascially was that Science admittedly hasn't figured out all the different forms of existence and life therefore how can we Atheist make a positive assertion that there is no God."
Basically, scientists know that life can exist in a lot of forms of liquid not necessarily water. This is why they are now searching for liquid on planets not only liquid water. Although, it is true that liquid is only a key ingredient in living organisms that we know of so far scientists know there likely are other forms of life. That does not require or prove a creator or that anything is supernatural. Every atom that ever was or will be came into existence during the big bang. All of the energy and mass in our universe was formed within and following the expansion of the singularity. Every atom then and now was actualized in the course of the big bang. Neither universe nor life in the universe requires a cause or a creator. At quantum physics level transitions do occur spontaneously without an apparent cause, like nuclear reactions. The Hubble Space Telescope will document how the universe evolved to gain insight into the most basic processes underlying the formation of everything around us. This study will allow us to chart for the first time the maturation process of galaxies.
Microbial life forms have been discovered on Earth that can survive and even thrive at extremes of high and low temperature and pressure, and in conditions of acidity, salinity, alkalinity, and concentrations of heavy metals that would have been regarded as lethal just a few years ago. These discoveries include the wide diversity of life near sea-floor hydrothermal vent systems, where some organisms live essentially on chemical energy in the absence of sunlight. Similar environments may be present elsewhere in the Solar System.
Scientists do not find it amazing or surprising that life evolved on earth or possibly on other planets. It was the religious that rejected those claims. Organic matter constantly rains down on Earth from space in the form of interplanetary debris. The crater record of the Moon shows that Earth experienced a period of late bombardment 3.8 billion years ago, just a bit earlier than when the oldest life forms appear in the fossil record. Tens of thousands of tons of extraterrestrial matter fall to Earth annually, even now. And the notion that chemical evolution occurs in space seems certain. Analyses of comets, meteorites and interstellar gas during the past two decades have proven that organic chemistry is widespread in the Universe. Terrestrial gases interacted with one another, as well as with energy, thereby synthesizing bigger molecules. Nothing magical or (supernatural) caused this rise in complexity. The same solar energy that clearly sustains life now was also active in helping to create life billions of years ago.
Humans are a biological component of nature that evolved. Some atoms arranged to form a brain that produced consciousness, but that doesn't mean atoms are conscious, or that all arrangements of atoms produce consciousness. It's the particular arrangement that matters. Our intelligence and consciousness evolved through trial and error. There were many intermediate species that went extinct. Evolution does not require anything new or unusual in the universe. The atoms that make up the molecules that make up life did not exist in the beginning. They came into existence over time as our universe evolved.
None of the caller's assertions explain how anything happened. I wouldn't be criticizing science if I didn't have any of the answers (god-did-it) doesn't answer anything.
NASA's Kepler space telescope has spotted five planets about the size of Earth, orbiting stars in our galaxy. Because of these findings by NASA's Kepler space telescope it seem less likely that we are alone. Scientists do think that life exists on other planets. They are in the "Goldilocks zone" where the distance from the planet to their star is optimal for supporting life. Up until now we have only found one of these, Gliese 481C, and the planet's existence was in doubt. Finding five of these planets, rocky planets that are optimal in size and location to support life makes it almost impossible to deny the existence of life on other planets. As many as 1/4 of all the sun-like stars in the Milky Way may have Earth-like worlds. One of astronomy's goals is to find 'eta-Earth,' the fraction of sun-like stars that have an earth. The number could be one in eight. But it's not one in 100, which was previously estimated. There could be even more Earth-size planets at greater distances, including within the habitable zone (Goldilocks zone) located at a distance form the star where conditions are not too hot or too cold to allow the presence of liquid water.
There well may be intelligent life or other life forms out there but that is not proof of a creator or a Supernatural Being. The atheists and scientists are not the one's making claims without providing evidence. Where is the proof (or evidence) of gods or the supernatural. It's pretty easy to let science provide all the answers and then sit back and say god-did-it. That's typical. Nobody has to prove that something does not exist; there are numerous absurdities that nobody can prove don't exist. I'll bet I won't get any answers either.
In "The Grand Design" by Stephen Hawking and Leonard Mlodinow it's explained that before the beginning of the Universe, there was nothing, no other universe, no god, no creator, and no flow of time. It's hard to comprehend because we think in terms of now and earlier and later or a beginning to everything, which is not always true. Physicist Stephen Hawking compares the beginning of the Universe to the South Pole. If you start at the South Pole you can go North just like you can go forward in time from the beginning of the Universe. But you can't go South (p 135 in The Grand Design). Starting at the South Pole, there is no South; this is just like at the start of the Universe when there is no earlier time.
The caller must think that other forms of life are found that would prove there is a god. Most scientists support the theory that there probably are other life forms in the universe, but that does not give credence to the existence of god or the supernatural. Scientists discovered and observed evolution-taking place. Scientists have observed replicating chemical chains forming from non-replicating chains. Scientists have found the answers that have unlocked many of the mysteries of the universe and life in the universe. God-did-it has answered nothing. Other forms of life could have evolved but nothing was created. Does god have a cause? If god has a cause what is it? The caller does not have to give any proof for the god theory or anything else; but scientists do. The caller has no argument. When you start basing what is true on assumptions you wind up with religion.
"You cannot reason someone out of something they were not reasoned into." Jonathan Swift