quote: It is also around a much smaller and redder star than ours, and would not work well for what plant life we know about. Photosynthesis would be much less efficient with that wavelength of light.
quote: Using everything about the planet Earth as a blueprint to find other life is incredibly short-sighted in my opinion. It ignores the possibility that life evolved elsewhere under radically different conditions.As far as I'm concerned, the playing field is wide open. There is no such thing as a "habitable zone". Even on Earth we have life where it was previously thought to be impossible to exist.
quote: Tardigrades can withstand temperatures from just above absolute zero to well above the boiling point of water, pressures about six times greater than those found in the deepest ocean trenches, ionizing radiation at doses hundreds of times higher than the lethal dose for a human, and the vacuum of outer space. They can go without food or water for more than 10 years, drying out to the point where they are 3% or less water, only to rehydrate, forage, and reproduce.
quote: I tend to agree, but maybe that's because I'm a Trek fan, and I believe in the possibility of silicon-based lifeforms, etc. (No, not the type that reside in LA, south-beach or Rio).
quote: This planet has a year equal to 130 of our days, and may have a much slower rotational period than Earth thanks to its close orbit. It is also around a much smaller and redder star than ours, and would not work well for what plant life we know about. Photosynthesis would be much less efficient with that wavelength of light. We wouldn't have to worry about sunburn, though.
quote: Chlorine, Arsenic and Sulfur are also possible replacements for Carbon, Sulfur is able to form long chain molecules similar to Carbon, heck bacteria has already been found to thrive on sulfur instead of oxygen, by reducing sulfur to hydrogen sulfide.