New research by a team of researchers from Australia and China suggests that the first rain appeared on Earth around 4 billion years ago, 500 million years earlier than previously thought.
To pinpoint the exact time of the first rain on our planet, the team relied on oxygen isotopes preserved in ancient minerals, the oldest remaining from the Earth's crust, stored in the Jack Hills range, Western Australia.

About 4 billion years ago, the ancient Earth had a dry, dusty landscape with little water. And the first rain may have contributed to the first seeds of life.
According to research, it is likely that inside the zircon crystals of the soil and rocks, there are water droplets from the oldest rain on Earth. These primordial minerals have remained virtually unchanged for nearly 4.4 billion years, under the temperature and pressure of the environment. Therefore, they have helped researchers have a clearer view of the history of the formation of the Earth.
Scientists analyzed tiny zircon grains using secondary ion mass spectrometry to deduce which oxygen isotopes were present in the magma that formed the crystals.
Scientists' new discovery marks a major step forward in our understanding of Earth's early history, and opens doors to further exploration of the origins of life.