"The Moon and Mars were the two most likely candidates for life in the solar system; what exists beyond our solar system is mere guesswork"

This quote by Walter Lang recommends that the Moon and Mars were the 2 probably places to find life in our planetary system. This implies that the other planets and moons in our solar system were not as most likely to consist of life. Lang also suggests that what exists beyond our solar system is unknown and is just speculation. This implies that we do not have enough evidence to make any definitive conclusions about what lies beyond our planetary system. Lang's quote highlights the significance of additional exploration and research study in order to gain a better understanding of our universe. It also functions as a pointer that there is still much to be discovered which we need to not take anything for given.