After countless studies about the origins of water, and therefore the origins of life, water seems to have come from space. Scientists have believed for a long time that the water came from comets. After the famous landing on such a comet and studying it, it would seem that water comes from ancient dust, and that original water may have been preserved by a volcanic type of rock.
Earth was formed around 4 billion years ago through many collisions with rocks and dust that surround the sun. Until now it was believed that during this process some molecules that contained water were freed and so they arrived on the blue planet. Therefore, it would seem that the first water came to Earth through a collision with an asteroid or a comet.
Lydia Hallis, planetary scientist at the University of Glasgow needed some undisturbed soil from the formation of the Earth, and her team found it as lava samples from Baffin Island and Iceland. Why lava samples? Simply because it is the closest type of Earth mantle to the original. Other types of rocks closer to the surface are affected and influenced by various phenomenons.
During their study, Hallis and her team searched for deuterum, a modified type of hydrogen, and found out that each planet, asteroid or comet had a different ratio of deuterium. The ratios taken from the lava samples were the lowest to be recorded. Their test’s conclusion was that the water accumulated on the blue planet, rather than appearing through a collision.
Karen Meech, astronomer at the University of Hawaii, stated that many more measurements are needed in order to reach a conclusion, as this is a very complicated story. As a preliminary conclusion, scientists are of the opinion that the grains of dust which contributed to the formation of the planet had a lot of water, ad thus retained liquid water delivering it to Earth.
In the end, the research will need much more data to come to a conclusion. That water seems to have come from space is certain, but more studies will need to be conducted in order to reach a conclusion. Until then, we will have our mysteries of origins to endlessly debate.
Image Source: www.pixabay.com