Bacteria are weaving forever chemicals directly into their cell membranes, study finds
Bacteria can incorporate polyfluoroalkyl carboxylates, a type of PFAS, directly into their cell membrane lipids. This process demonstrates a biological interaction with these persistent environmental contaminants and suggests a potential microbial role in PFAS transformation, though complete degradation and disposal remain unresolved challenges.

Yongchao Xie et al, Bacteria covalently incorporate polyfluoroalkyl carboxylates into membrane lipids, Nature Microbiology (2026). DOI: 10.1038/s41564-026-02301-x

AI makes rewilding look tame—and misses its messy reality
AI-generated images of rewilded British landscapes tend to depict sanitized, orderly scenes lacking ecological complexity, messiness, and controversial species. These images often exclude humans, decay, and less charismatic wildlife, reflecting the sanitized visuals promoted by environmental organizations. Accurate, ecologically rich depictions require highly specific prompts, limiting their accessibility to non-experts.

original article.

New study finds eye focuses using color signals, not just sharpness

The human eye functions like an exceptionally precise, high-end camera, one with a resolution of around 576 megapixels. What makes it intriguing is that although our eyes can focus on light at only one wavelength at a time, the result isn't fragmented or blurry. What we see feels seamlessly sharp and rich in details. This raises the question of which color it chooses to focus on when the scene we are looking at has multiple colors. A recent study published in Science Advances presents a mechanism that guides the choice.

The researchers discovered that the eye chooses its focus to maximize the quality of signals in specific neural pathways called color-opponent channels. These channels are neural pathways that combine signals from the three types of cone photoreceptors—long, medium, and short—into distinct patterns for color processing. These combinations create three channels: red–green, blue–yellow, and finally black–white, which represents brightness. Each channel operates in opposition, meaning that the two colors in a pair, such as red and green, cannot be perceived simultaneously.

This new discovery challenges the leading theory on which color the eyes choose to focus on.

In the real world, objects are almost never perfectly in focus, and the eyes constantly adjust to see objects clearly at different distances via a process called accommodation. This lack of focus is because visible light is made up of many different wavelengths, and each one bends slightly differently as it passes through the eye. Short wavelengths, such as blue light, focus closer to the lens; while longer ones, such as red light, focus farther away. Since the retina sits at a fixed distance behind the lens, not all wavelengths can be in focus at once, which creates a multi-colored blur known as longitudinal chromatic aberration (LCA).

Previously scientists thought that the eyes' choice of colour on which to focus hinged on achieving the best possible visual acuity—our ability to see fine details. The idea was that this mechanism worked by maximizing luminance contrast, enhancing the overall brightness and clarity of an image. However, this new discovery challenges that long-held notion.

The new study questions the prevailing theory, suggesting that brightness and contrast alone don't fully explain how the eye focuses on colored objects. There must be color-processing mechanisms at play too. To test this, the researchers used a combination of specialized hardware, personalized eye mapping, and computer simulations.

The results showed that the human eye doesn't just focus on light to make images as sharp and bright as possible, as scientists long thought. Instead, the eye picks which color on which to focus based on what allows the brain's color-processing pathways to work most efficiently.

The team also found that instead of focusing on extreme wavelengths like blue, the eye often chooses a middle wavelength like greenish-yellow as a compromise. This approach keeps the main image sharp while leaving the blue areas slightly blurry, resulting in a stronger, clearer signal for the brain to process.

Benjamin M. Chin et al, Focusing on color: How the eye chooses which wavelength to see best, Science Advances (2026). DOI: 10.1126/sciadv.aea5693