This is a demonstration peer review prepared for a test inscription on the Bitcoin blockchain. The purpose of this text is not to evaluate a scientific study but to illustrate the approximate size of a short review when compressed and inscribed. The total word count is close to two hundred, which is typical of a concise referee report. The text includes background context, main comments, and a short concluding remark.

Background: The fictional paper under review describes the growth of imaginary plants in simulated Martian soil. The authors claim that growth rates are comparable to those achieved on Earth. The overall presentation is clear, but there are important limitations. 

Main comments: First, the description of the soil simulation is incomplete. It would help to provide specific mineral content, pH range, and water availability. Second, the growth measurements rely only on visual inspection. I suggest adding quantitative metrics such as biomass, chlorophyll concentration, or digital image analysis. Third, the discussion section does not acknowledge relevant prior work on hydroponic growth experiments in closed systems.

Conclusion: The manuscript is intriguing and potentially impactful, but additional methodological detail and proper quantification are necessary before it can be accepted.