New research suggests that the circumstellar habitable zone for terrestrial planets around stars is narrower than previously thought.
Remember CHONPS — the acronym you learned in high school to remember the elements most important for life?
Neither the Earth nor the human race is allowably described as unusual, because that could suggest (shudder) intelligent design.
Today scientists marvel at the many associations among water chemistry, the environment, and life.
The basic idea is that meeting the requirements for the habitability of the Earth for observers makes it more likely that solar eclipses are possible.