And we do care about planets like the Earth because by now we understood that life as a chemical system really needs a smaller planet with water and with rocks and with a lot of complex chemistry to originate, to emerge, to survive.
Sí que nos preocupan los planetas similares a la Tierra porque hasta ahora entendíamos que la vida como sistema químico necesita un planeta menor con agua y rocas y con mucha complejidad química para originar, emerger y sobrevivivr.