Researchers from University of Portsmouth have traced the origins of water to supernova explosions in early universe, suggesting the ingredients for life on Earth.

As that gaseous oxygen cooled and mixed with the surrounding hydrogen left by supernovae, water could have formed in a gaseous state - as vapor

Despite covering nearly 70% of Earth's surface, the origins of water have long remained a cosmic mystery. Now, groundbreaking research suggests that water might have formed in the fiery aftermath of the universe’s first supernova explosions—100 to 200 million years after the Big Bang.