Scientists were puzzled: traces of ordinary earthly objects, from ink to alcohol, were found in Martian meteorites. These are not alien artifacts, but the result of laboratory contamination!
While NASA's Perseverance rover diligently collects Martian soil, scientists on Earth have long been actively studying 'guests' from space — meteorites that have come to us from the Red Planet. Recently, researchers from the University of the Basque Country made a surprising discovery: certain 'synthetic organic molecules' were found in these cosmic rocks, which are completely uncharacteristic of Mars.
Earthly Traces on Martian Rock
However, detailed investigation quickly revealed that these mysterious traces are not of Martian origin at all. Among them were ethyl alcohol, minute diamond dust, and even components of ink from ballpoint and gel pens.
As the authors of the study explained, these are not Martian secrets, but rather banal terrestrial contamination. It occurs right in the laboratories when meteorites are prepared for thorough analysis. The processes of cutting, polishing, and chemical treatment inevitably leave microscopic traces from the tools and reagents used.
How Does Contamination Occur?
The most risky stage turns out to be the dissection of the internal fragments of the meteorite. Although the outer crust protects the rock from earthly influences, to study the 'pure' material, scientists have to open it, and this is where the danger lies.
Scientists acknowledge that even the strictest protocols cannot completely eliminate external impurities. For example, ethyl alcohol is regularly used to clean equipment, and diamond abrasives are used for precise cutting of samples. Similar traces have been found before, for instance, in lunar samples from the Apollo mission.
Amazing Discoveries: Ink and Pigments
In this study, traces of ink were particularly prominent: two types of blue ink from ballpoint pens and the characteristic pigment 'hostaperm violet' (Pigment Violet 23), which is used in gel pens.
Researchers unequivocally state: these compounds are the result of purely laboratory contamination, not evidence of Martian organics. Importantly, the detection of such 'foreign signals' is not an error, but a valuable experience that helps improve sample preparation protocols.
Lessons for Future Research
In particular, it is suggested to reconsider the choice of solvents and cleaning methods to minimize the likelihood of transferring organic traces. At the same time, researchers humorously add that there are currently no plans to ban the use of pens in laboratories, although they have become the source of such unexpected 'Martian' molecules.
