Since the early 1960s, with the advent of interplanetary space travel the dramatic increase in the detail in which planetary bodies can by studies has led to a refocusing of these sciences into an object oriented, rather than a discipline oriented study generally know as planetary sciences. Biology has typically been on the fringe of planetary sciences, mostly in terms of the origin of life on Earth. There has always been a small contingent of scientists interested in extraterrestrial life and the possible extraterrestrial origin of life on Earth, but the discovery of biological colonies in the seemingly hostile environment of volcanic hot springs on the sea floor in the mid 1970s, and the subsequent discoveries of life in other generally hostile terrestrial environments, has spawned new searches for life on other planets in our Solar System. Although science enters into the lives of all people in the modern world, demands for changes in school science curricula and cultural misapplications of science show a poor understanding of what science is and what it is not. Firstly, science does not deal with truth .
Truth is absolute.
In science, even an observation or measurement, such as the speed of light, is subject to an improved method of observation or measurement, and thus, the accepted value for the speed of light may change. Neither, but both may be useful in their time. Thus, although science does not deal with the truth, its systems causes errors to be corrected, and understanding and quantification to be improved. Correction and improvement are not a simple path and often incorrect ideas are pursued for a long time before they are finally overthrown. The bottom line is that if a physical explanation satisfies the majority of all the observations that have been made relative to that explanation, then that explanation should be accepted.