DARPA is seeking innovative research proposals for the development of large, adaptable bio-mechanical structures for use in space. The goal is to leverage biological systems like plant growth or fungal mycelia to create structures in orbit, reducing the reliance on traditional manufacturing and launch limitations. This research will focus on demonstrating the feasibility of bio-based structural materials that can self-assemble, self-repair, and adapt to changing mission needs in the harsh space environment. The program envisions structures potentially spanning kilometers in size, drastically changing the possibilities for space-based habitats, solar sails, and other large systems.
"Anatomy of Oscillation" explores the ubiquitous nature of oscillations in various systems, from physics and engineering to biology and economics. The post argues that these seemingly disparate phenomena share a common underlying structure: a feedback loop where a system's output influences its own input, leading to cyclical behavior. It uses the example of a simple harmonic oscillator (a mass on a spring) to illustrate the core principles of oscillation, including the concepts of equilibrium, displacement, restoring force, and inertia. The author suggests that understanding these basic principles can help us better understand and predict oscillations in more complex systems, ultimately offering a framework for recognizing recurring patterns in seemingly chaotic processes.
Hacker News users discussed the idea of "oscillation" presented in the linked Substack article, primarily focusing on its application in various fields. Some commenters questioned the novelty of the concept, arguing that it simply describes well-known feedback loops. Others found the framing helpful, highlighting its relevance to software development processes, personal productivity, and even biological systems. A few users expressed skepticism about the practical value of the framework, while others offered specific examples of oscillation in their own work, such as product development cycles and the balance between exploration and exploitation in learning. The discussion also touched upon the optimal frequency of oscillations and the importance of recognizing and managing them for improved outcomes.
Summary of Comments ( 41 )
https://news.ycombinator.com/item?id=43185769
Hacker News users discuss the feasibility and practicality of DARPA's bio-engineered space structure concept. Several express skepticism about the project's timeline and the biological challenges involved, questioning the maturity of the underlying science and the ability to scale such a project within the proposed budget and timeframe. Some highlight the potential benefits of using biological systems for space construction, such as self-repair and adaptability, while others suggest focusing on more established materials science approaches. The discussion also touches upon the ethical implications of introducing engineered life forms into space and the potential for unintended consequences. A few commenters note the ambitious nature of the project and the possibility that it serves primarily as a stimulus for research and development in related fields.
The Hacker News post titled "DARPA Large Bio-Mechanical Space Structures" with the link to the SAM.gov opportunity has generated several comments discussing the feasibility, potential applications, and ethical implications of the proposed technology.
Several commenters express skepticism about the practicality of growing large structures in space, citing challenges such as radiation exposure, nutrient supply, and the control of growth in a microgravity environment. One commenter questions the wisdom of investing in such a speculative technology, suggesting that focusing on more conventional approaches to space construction might be more fruitful. They specifically mention the difficulties in scaling up biological processes to the sizes required for space structures, drawing comparisons to the limitations observed in scaling other biological systems.
Others express concerns about the potential risks of introducing biological material into space. One commenter raises the possibility of unintended consequences, such as contamination of other celestial bodies or the creation of space debris. Another highlights the ethical implications of using living organisms for construction purposes, questioning whether it's appropriate to exploit biological systems for such ends.
Despite the skepticism, several commenters express excitement about the potential of the proposed technology. Some envision the possibility of creating sustainable habitats and infrastructure in space using self-replicating biological systems, while others suggest that such technology could be used for terraforming other planets. A comment specifically discusses the idea of using fungi or other organisms for construction, referencing mycelium as a potential building material due to its strength and lightweight properties. They further point out the potential benefits of using in-situ resources, reducing the need to transport materials from Earth.
The discussion also touches on the technical challenges of controlling the growth and shape of biological structures in space. One commenter points out the need for advanced bioengineering techniques to precisely guide the development of these structures, suggesting that genetic engineering and other synthetic biology approaches may be necessary.
Overall, the comments reflect a mixture of skepticism, excitement, and concern about the potential implications of DARPA's proposed bio-mechanical space structures. The discussion highlights both the potential benefits and the significant technical and ethical challenges that need to be addressed before such technology can become a reality.