What does contemporary research suggest about the source of Earth's water, contradicting the long-standing idea?

Answer

Water-bearing materials were locked into the planet's building blocks as they formed within the nebula

Current studies propose a more direct heritage, indicating that water was present in the nebula even near the Sun, meaning it was incorporated directly into the materials that formed Earth, rather than being delivered later.

What does contemporary research suggest about the source of Earth's water, contradicting the long-standing idea?
astronomyEarthsolar systemplanet formationsolar nebula