AI Insight
The article explores the scientific question of how Earth acquired its water and oceans. Rather than water being delivered primarily by comets or asteroids after Earth's formation, emerging evidence suggests Earth may have generated much of its water internally through chemical processes during its early formation. This challenges the traditional "late veneer" hypothesis that external bodies brought most of Earth's water after the planet had largely formed.
Why it matters
Understanding Earth's water origins has implications for assessing how common water-rich, potentially habitable planets might be throughout the universe. If planets can generate their own water during formation rather than requiring specific delivery mechanisms, this could significantly increase estimates of habitable worlds in other solar systems.
At this moment, a spacecraft is headed from Earth to Europa, an ice-veiled moon of Jupiter thought to contain an ocean similar in some ways to one of our own. NASA engraved a metal plate affixed to the spacecraft with a poem, commissioned from Ada Limón during her time as poet laureate of the United States. It reads, in part: And it is not darkness that unites us, not the cold distance of…
Source: Where Did Earth Get Its Oceans? Maybe It Made Them Itself.