80% Accurate: New Tech Detects Life Signs In Space

Researchers at the University of Osaka have made a breakthrough in the search for extraterrestrial life, developing an electrical method to detect signs of life in space. The technique uses nanogap tunneling to distinguish between the L- and D-forms of amino acids, which is a potential biosignature of life.

The method involves measuring the electrical tunneling current generated by molecules passing through a gap between two gold nanowires. This approach has been tested using meteorite and desert samples, demonstrating its potential for astrobiology research.

The L/D ratio is a key indicator of life, as living creatures almost exclusively produce amino acids in the L-form, while nonliving chemical and physical processes produce both L- and D-forms in equal abundance. By detecting this ratio, the technique can help identify signs of life in space.

The team, led by Takahito Oshiro, used artificial intelligence to distinguish between the L- and D-forms of amino acids, achieving an accuracy of over 80%. This discovery is set to be published in Nature Communications.

## Why it matters The search for extraterrestrial life is an ongoing challenge, with scientists relying on the detection of biosignatures to identify potential signs of life. The L/D ratio is a promising biosignature, but traditional methods of detection have practical limitations. The new electrical technique developed by the University of Osaka researchers offers a simpler and more sensitive approach, which could be used in future astrobiology research.

The implications of this discovery are significant, as it could potentially be used to detect signs of life on other planets or moons in our solar system and beyond. The ability to detect biosignatures like the L/D ratio could help scientists better understand the origins of life and the possibility of life existing elsewhere in the universe.

## What happens next The publication of this research in Nature Communications is a major step forward, and the technique is likely to be further developed and refined in the coming years. As scientists continue to search for extraterrestrial life, the use of electrical techniques like this one could become increasingly important. With its high accuracy and potential for use in a variety of environments, this technique could play a key role in the search for life beyond Earth.