News thumbnail
Science / Fri, 06 Nov 2026 Mid-Day

New research challenges theory that Earth's oceans came from comets and meteorites

Earth may have generated its own water 4.5 billion years ago, new study suggestsThis suggests that hundreds of oceans’ worth of water could have naturally formed internally. An illustration of early Earth with a molten surface. PIC COURTESY/University of New MexicoNew laboratory research revealed that rocky planets like Earth may have generated their own water 4.5 billion years ago, challenging the long-standing theory that oceans came exclusively from comets or meteorites.

Earth may have generated its own water 4.5 billion years ago, new study suggests

This suggests that hundreds of oceans’ worth of water could have naturally formed internally.

An illustration of early Earth with a molten surface. PIC COURTESY/University of New Mexico

New laboratory research revealed that rocky planets like Earth may have generated their own water 4.5 billion years ago, challenging the long-standing theory that oceans came exclusively from comets or meteorites.

© All Rights Reserved.