The space rock dates to around 4.6 billion years ago and is believed to be similar in composition to early Earth, according to a study published Wednesday in the journal Icarus. The researchers found that the majority of the hydrogen contained within the meteorite was intrinsic,

All that said, the findings can’t confirm the terrestrial life theory beyond a doubt. There’s still a chance hydrogen-heavy meteorites helped us along. Still, the new evidence makes a strong case that ancient Earth had the ability to form water all on its own—no space rocks needed.

Experts from the University of Oxford now think that the rocky material which built our planet had the elements it needed to make water without any help.