Final answer:
True. Leading scientists speculate that it is true numerous planets could support life forms, as vast numbers of stars and galaxies increase the probability of life-sustaining conditions elsewhere. Astrobiology research, exemplified by Mars and Europa, seeks to find evidence of life beyond Earth.
Step-by-step explanation:
It is true that leading scientists speculate that numerous planets could support life forms. The Copernican principle suggests there is nothing exceptional about Earth's position in the universe to preclude the existence of life elsewhere. Considering the vast number of stars in our galaxy, and the billions of other galaxies, the probability of other life-sustaining planets is high. Astrobiology explores this possibility, focusing on the origin, evolution, and properties of life on Earth to aid in the search for extraterrestrial life. Mars and Jupiter's moon Europa are examples within our solar system that might support life, with Mars having had warmer, wetter conditions in the past, and Europa possibly hiding oceans beneath an icy surface. Research is actively pushing in these directions to scientifically answer the question, "Are we alone?"