University of Sydney researchers made carbon-rich dust in glass tubes by exposing nitrogen, carbon dioxide and acetylene to about 10,000 volts for an hour, but they did not make life or prove that cosmic dust seeded life on Earth. [1]

The electrical glow discharge split the gases' molecules and allowed their components to recombine, settling material on silicon chips as dust containing carbon, hydrogen, oxygen and nitrogen, the group of elements often abbreviated as CHON, which occur in molecules important to life but whose presence is chemistry rather than biology. [1]

ScienceDaily, carrying edited university-release material, says the samples produced infrared signatures resembling those seen in space, making the experiment useful as an analogue because astronomers infer the composition and history of distant dust from such spectral fingerprints and a laboratory library could help them compare observations with material formed under controlled conditions. [1]

An analogue remains an analogue, and the experiment did not identify every molecule in the dust, establish that its composition or abundance matches interstellar material, or reproduce the full conditions around stars and supernova remnants, while different gas mixtures, temperatures and ion energies could produce different results and independent replication remains necessary.

The origins-of-life question sits several steps farther away because researchers still do not know where all early organic material formed or how much arrived on Earth through meteorites, comets and dust, so this glass tube offers a way to test possible chemical pathways while calling it creation replaces that instrument with a claim the experiment never made.

-- KENJI NAKAMURA, Tokyo