I don't deny that this is true because the chemical ingredients of life were not necessarily present only on Earth and, ultimately, all the living things originated from stardust.
There are many other studies which indicate that there is a presence of organic materials in the tiny grains of dust contained within the surface of both comets and meteorites. For example, here are two more articles on this topic:
1. Meteorite Holds Amino Acid Surprise
2. Evidence of Liquid Water in Comets Reveals Possible Origin of Life
There are many other studies which indicate that there is a presence of organic materials in the tiny grains of dust contained within the surface of both comets and meteorites. For example, here are two more articles on this topic:
1. Meteorite Holds Amino Acid Surprise
2. Evidence of Liquid Water in Comets Reveals Possible Origin of Life
