The interstellar medium is characterized by a rich and diverse chemistry. Many of its
complex organic molecules are proposed to form through radical chemistry in icy grain …

Despite the generally hostile nature of the environments involved, chemistry does occur in
space. Molecules are seen in environments that span a wide range of physical and chemical …

The pristine sample from the near-Earth carbonaceous asteroid (162173) Ryugu collected
by the Hayabusa2 spacecraft enabled us to analyze the pristine extraterrestrial material …

Context. Urea, NH 2 C (O) NH 2, is a molecule of great importance in organic chemistry and
biology. Two searches for urea in the interstellar medium have been reported in the past, but …

We report primordial aqueous alteration signatures in water-soluble organic molecules from
the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 spacecraft of JAXA. Newly …

Photophysical investigations of the canonical nucleobases that make up DNA and RNA
during the past 15 years have revealed that excited states formed by the absorption of UV …

The evolution of coenzymes, or their impact on the origin of life, is fundamental for
understanding our own existence. Having established reasonable hypotheses about the …

Evolved interstellar ices observed in dense protostellar molecular clouds may arguably be
considered as part of precometary materials that will later fall on primitive telluric planets …

The delivery of organic matter to the primitive Earth via comets and meteorites has long
been hypothesized to be an important source for prebiotic compounds such as amino acids …

The discovery of meteoritic amino acids with enantiomeric excesses of the l-form (ee L) has
suggested that extraterrestrial organic materials may have contributed to prebiotic chemistry …