We’ve found molecules linked to life on Mars, but let’s not break out the champagne just yet

The Curiosity rover has carried out a chemical experiment on Mars that has never been done on another planet. Thanks to it, it has detected organic molecules that until now had gone unnoticed by us. Does that mean that there is or was life on the red planet? It could be, but it could also be due to many other things. Although we always read this type of news with joy and it gives a lot of sensational headlines, we must analyze the results with the optimism of what they mean for science, but the caution of what they imply in the search for extraterrestrial life. Chemical advances millions of kilometers away. Curiosity’s SAM instrument has carried out an experiment known as thermochymolysis. In it, a reagent called tetramethylammonium hydroxide (TMAH) is used. to break large molecules into small fragments. Thanks to this, organic molecules can be detected that are invisible with other methods. Among other organic molecules, some rich in nitrogen have been found, which could be related to DNA synthesis. The discovery of benzothiophene, present in some biological processes, also stands out. Let’s not go up. The authors of the study that has just been published thanks to the Curiosity rover they call for caution with its results. They insist that all the molecules found could come from abiotic processes or have reached Mars from other points in space. For example, benzothiophene could be formed by geological or hydrothermal processes. In addition, its presence has been found in meteorites and asteroids on Earth. It could also have reached Mars like this. Only two tries. Regardless of whether the findings have to do with life or not, this study is very relevant for two reasons. On the one hand, because it was the first time that this experiment could be carried out outside of Earth. And, secondly, because Curiosity I only had two tries to do it, but he made good use of them. This is because TMAH was in the exact dose needed, inside two sealed capsules. If the first failed, the second could be tried. If this one did it too, goodbye experiment. That it was done without problems has been a great achievement. This is an annotated close-up of three holes that NASA’s Curiosity drilled into Martian rock at a location nicknamed “Mary Anning” in October 2020. The sample where the rover found a large number of organic molecules came from “Mary Anning 3.” (A nearby site nicknamed “Mary Anning 2” was left unused.) NASA/JPL-Caltech/MSSS A very old search. Science has been obsessed with the search for life on Mars since in the 17th century some scientists detected with their telescopes what appeared to be the presence of water ice. Already in the 21st century, advances in space exploration allowed orbiters and rovers to be sent to Mars in order to analyze possible signs of life. Some were found. For example, in 2018 methane was detected in its atmosphere. This could be the result of microbial activity, but also geological processes. In 2020 Curiosity found carbon isotopes and later, in 2025, the longest carbon chain found to date. It is true that carbon is necessary for life, but it can also be related to many abiotic processes. In none of these cases has it been possible to demonstrate that there is life behind it, so we still cannot prove that there is life on Mars. Maybe we lack tools. In 2023 a study was carried out in the Atacama Desert to analyze the tools normally used to search for life on Mars. This desert is one of the largest Martian analogues we have on Earth. It has many similar characteristics to those of the red planet; but, of course, it also has more than proven life. However, when analyzed with Mars exploration tools, many of the traces of life that should have appeared were not detected. This shows that perhaps we haven’t found life on Mars yet because we don’t have the right tools. Although there may also simply not be any. The future. Curiosity has carried out this experiment directly on Mars. However, the ideal would be to send rock samples to Earth, to use other more complex analysis technologies there. Another rover, Perseverance, is prepared to collect samples and send them to Earth. In fact, it was scheduled to do so. However, the mission was canceled by the United States Congress last January. Meanwhile, other space agencies aim to replicate the TMAH experiments. This is the case of the ExoMars mission of the European Space Agencywhose Rosalind Franklin rover will also travel with this reagent to carry out thermochemolysis. We’ll have to wait to see what he discovers. Whatever it is, as always, we will read it with caution. Image | POT In Xataka | ExoMars, this is Europe’s most ambitious mission to Mars

While farmers fear the pact with Mercosur, one sector brings out the champagne: the automobile industry

From 35% tariffs to their non-existence through a progressive de-escalation that will advance over time. That is the new scenario that the European Union and Argentina, Brazil, Paraguay and Uruguay have, those countries that make up Mercosur with which the European Union has signed an agreement that will create the largest free trade area in the world. The agreement. After 26 years of negotiations, on January 9, 2026, the news broke: Mercosur (Argentina, Brazil, Paraguay and Uruguay) and the European Union they reached an agreement to create the largest tariff-free trade zone in the world. The pact was already almost confirmed but ended up being approved by the European Union with the approval of 21 countries (including Spain) and the votes against of France, Poland, Austria, Ireland and Hungary, as well as the abstention of Belgium. After European approval, The signing will arrive next January 17 in Paraguay. Then a project will be launched that in the next 15 years will end up eliminating the tariffs that exist between both commercial zones. A pact that will make things complicated for the primary sector but which has the European industry as the great winner. And in that industry, the automobile is one of the most benefited sectors. Why the car industry? Until now, exports from the European Union to Mercosur had tariffs of 35% on their shoulders. The pact will eliminate any type of trade barrier over 15 years. It will be gradual but after three decades, vehicle exports to South America will be completely tariff-free. That, according to data collected by The Automotive Tribuneis expected to triple the volume of exports from the European Union to this region. It remains to be seen what steps will be taken year after year but in Infobae They already anticipate that exports are expected to Brazil and Argentina with a maximum quota limit that will expand at the same rate as tariffs are reduced. Spain. One of the countries that can emerge the most strengthened from the agreement in the automobile sector is Spain. Although the figures point to a drop in production and export of automobiles this year, our country is the second European power in vehicle production (behind Germany) and more than 90% of the cars manufactured leave our borders. But, furthermore, our country is a large producer of vehicle components that will also discount tariffs on their exports. The news is especially interesting for a sector that has suffered from the tariffs imposed by the United States Government. And it is that Spain does not send cars to the American country but automobile components. Holy water for Europe. The agreement feels like holy water for European manufacturers. Currently, the cars sold in Mercosur countries are cheaper and have very poor security measures if we compare them with Europeans. Acting without tariffs will allow them to sell more cars and amortize investments than with the European emissions policies their days may be numbered. It is a good outlet for lower priced vehicles and an opportunity to compete with higher quality cars. It allows them follow that Toyota maxim to sell in each market what each market demands. But it also opens the door to compete with China, which was eating up the market by exporting cars in large volumes. They collect in Infobae that the measures that have tried to benefit the entry of hybrids and electric vehicles to Argentina and Brazil have ended up filling these markets with Chinese cars, which represent 80% of imports. USA. It must be taken into account that, in addition, dark clouds had settled on the future of the European automobile industry. Tariffs on exports to the United States they had done enormous damage despite the fact that mostly high-cost vehicles were being sold there. The problem is that the most affordable ones of European origin They are mostly manufactured in Mexico so they have also been bleeding with trade barriers. It is expected that exports to the Mercosur countries, due to purchasing power, will not generate as much money per car sold but they are expected to be much more voluminous. Eliminating tariffs will allow, as we say, to amortize investments in vehicles with lower prices and lower profit margins. They lose. The one that, predictably, will lose will be the local industry. Right now Mercosur has an industry sustained in the production of very specific vehicles for its market and with very high trade barriers that causes a very low volume of imports. Furthermore, they provide feedback to each other since 75% of car imports in Argentina They come from Brazil. Now the industry has the challenge of opening up and being more competitive. The problem for Mercosur is that, due to the cars manufactured, it seems that this sector only has one way and that is one way from Europe to South America. The return, with combustion vehicles and safety standards much less demanding than the European ones, everything indicates that it will be deserted. Photo | Jeanne Menjoulet and Mercedes In Xataka | China has a weapon to circumvent tariffs and protect the secrets of its electric cars: removable kits

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