Bold claim: science just got a little wilder—and this is where the debate begins. Welcome to the concept of “necroprinting,” where a 3D printer nozzle is crafted from a mosquito’s proboscis. Here’s how the process unfolded, along with the benefits, the trade-offs, and what it could mean for the future.
The researchers describe the fabrication steps this way: after taking an already euthanized mosquito, they extracted the proboscis under a microscope. The next step was to align the delicate nozzle with the outlet of a plastic tip, and then bond the two components together using UV-curable resin. This fusion yielded what they call a necro printer with an extraordinary resolution window of 18 to 22 microns—roughly half the size of what you’d achieve with the smallest commercially available metal dispensing tips. Early test prints included honeycomb structures at 600 microns, a microscale maple leaf, and cell scaffolds, all demonstrating the potential of the concept.
Yet the natural solution isn’t flawless. One major hurdle was internal pressure tolerance. Although the mosquito-based nozzle offered impressive precision, it struggled with higher-viscosity inks that behave more like pastes than liquids. These paste-like inks tend to hold their shape better, enabling more geometrically accurate parts that resist sagging, something the initial tests could only partly achieve.
There’s another clear limitation. While mosquito nozzles surpassed plastic or metal tips in precision, they didn’t match glass dispensing tips, which can draw lines under one micron wide and endure much higher pressure. So, the current mosquito design isn’t the universal answer, but it signals a promising direction.
To bridge the gap, the team is exploring hybrid approaches. One idea is to keep the mosquito proboscis as the core and coat it with ceramic layers to dramatically improve strength. If pressure resistance can be improved, the 18–22 micron resolution could be sufficient for a broad range of applications.
Looking ahead, Cao envisions uses such as printing scaffolds for living cells or manufacturing microscopic electronic components. The core appeal is replacing expensive, traditional nozzle systems with cheap, readily available organic alternatives. The mosquito-based approach offers two standout advantages: low cost and ubiquity. Mosquitoes are widespread and relatively easy to rear, positioning organic nozzles as a potentially inexpensive option—about 80 cents per nozzle, according to the researchers—whereas glass and metal options can cost 32 to over 100 times more.
The researchers are cautious but optimistic. They’re expanding studies on mosquitoes themselves, aiming to develop engineering solutions that not only leverage deceased specimens but also tackle bite-sized problems in practical contexts. The work appears in Science Advances, 2025 (DOI: 10.1126/sciadv.adw9953).
And this is where it gets controversial: should biology be directly repurposed into fabrication tools? What safeguards are needed to address biosecurity and ecological concerns when turning living organisms or their parts into manufacturing components? How far should this line of inquiry push the balance between innovation and risk? Share your thoughts in the comments: do the potential gains justify the challenges, or should this approach be limited to theoretical exploration?"}
