20 years ago it looked like only one place in the universe was capable of sustaining life: our home planet. Astronomers now think differently, explore the search for Earth's twin. Jakso Kausi Vuosi 2014
20 years ago it looked like only one place in the universe was capable of sustaining life: our home planet. Astronomers now think differently, explore the search for Earth's twin. Jakso Kausi Vuosi 2014