How and where did Earth get it's water from?

Early Solar System Formation: During the formation of the solar system 4.6 billion years ago, Earth is thought to have been too hot for water to exist in liquid form.

Outer Solar System Objects: The most favored theory suggests icy comets and asteroids from the outer solar system, rich in water ice, bombarded the early Earth.

Inner Asteroids: Some believe collisions with rocky bodies from the inner solar system, like asteroids, could have delivered some water. However, these bodies likely wouldn't have contained significant amounts.

Hydrogen in Earth: Recent studies of molybdenum isotopes in Earth's mantle suggest it may have originated in the outer solar system, potentially carried by these icy objects. This could indicate that the impacting bodies, not just water vapor,

Volcanic Degassing: Volcanic eruptions throughout Earth's history may have released water vapor trapped within the mantle, further contributing to the planet's water content.

Gradual Release: Water may have been trapped within minerals in Earth's rocks and slowly released over time through geological processes.

Ongoing Debate: The relative contribution of each source (asteroids vs. comets, inner vs. outer solar system) is a topic of ongoing research. Scientists analyze the composition of water on Earth and compare it with various potential sources like comets and asteroids.

Not all Earth's water came later: Some water may have been present during Earth's formation, incorporated from the protoplanetary disk that birthed the solar system.

Uncertainties Remain: While the icy objects from the outer solar system are considered the primary source, the exact proportions and timing of water delivery remain areas of active investigation.

This information is not DNA's opinion but obtained from media reports