We have now discovered all four building blocks of DNA in meteorite samples, suggesting that space rocks may have delivered the compounds to Earth, contributing to the origin of life
26 April 2022
DNA has a spiral-staircase structure, in which each step consists of pairs of molecules called nucleobases. Two of these four nucleobases – adenine and guanine, which belong to a group of chemical compounds called purines – were first detected in meteorites in the 1960s.
Now, Yasuhiro Oba at Hokkaido University …