Scientists have revived the theory that short-period comets could have played a crucial role in filling Earth's oceans with water.

Comet 67P's water has the same molecular signature as Earth's oceans, suggesting it may have contributed to Earth's water supply.

A wave of comet and asteroid collisions with the solar system’s inner planets 4 billion years ago would have made this possible.,” a portion of the report read. Adding, tha

Water is crucial for life, and while some of it likely originated from the gas and dust from which Earth formed, much would have vaporized due to the Sun's heat during the planet's early history.