Earth, Mars and Mercury; examples of rocky planets which astrobiologists believe could be a prerequisite for life. Over the past decade, researchers have completely rewritten the story of how gas giants form, and are now debating if cosmic pebbles could be the recipe for planets like Earth.

Astrobiology
Charting the Cosmos: the Concept of Kardashev Civilizations
As we gaze upon the universe, contemplating our place in its vast expanse, we grapple with questions about our future.