An absolute treasure trove of fascinating findings this month, this time including economics and history papers in addition to the usual lineup from the life sciences.

• We’ll start with the economics paper. It uses data from France to show that existing residents of municipalities are willing to pay a premium to avoid having lower income peers becoming their neighbors. They obtained this result from leveraging a French policy to require that municipalities build more social housing or pay a fine. All households dislike having lower income neighbors and the higher income the municipality, the more they are willing to pay to avoid having to host social housing projects. This result is of course both intuitive and unsurprising but does help illustrate the obstacles against building more housing to alleviate high prices in the property market.
• Last month I highlighted research about how schizophrenia patients mistake mistake inner speech with external stimuli, leading to auditory verbal hallucinations, i.e. hearing things that aren’t real. This month I have a startlingly similar finding in the same vein by a different team. They show that the same principle applies to the sense of touch when the experiment called for the subject to differentiate between touching their own arm, being touched by an experimenter and touching a pillow as a control. From observing the brain activity of the participants in the study, the researchers were able to notice significantly higher activity in the right superior temporal gyrus among schizophrenia patients when touching themselves compared to healthy individuals. Similar results were found in other variations of the experiment.
• How many people remember the 1966 film Fantastic Voyage about a submarine being shrunk down to microscopic size and inserted into a human body so that the crew can repair that person’s brain damage?? It seems that we’re about to have something similar though of course it’s not a submarine but tiny robots guided through the body using magnetic fields. The article describes trials of the microrobots in the blood vessels of pigs and sheep which are guided to the target sites to release precise doses of drugs at specific locations. The system has yet to be tested in humans but the potential to deliver such precise doses, avoiding the toxicity of inundating the entire body in drugs, and to target hard to reach areas are obvious.
• Next we have this news about how North American raccoons are physically changing as they adapt to life in closer proximity to humans. Specifically they find that raccoons living in urban environments have significantly shorter snouts than those in rural areas. They classify this as an early form of self-domestication as selection pressures push them to be bold enough to forage for food from human garbage yet not appear as a threat to humans. This is similar to the processes that proto-dogs and cats went through.
• Finally we have the release of a high-resolution dataset of the roads of the Roman Empire. The dataset draws on published historical and archaeological information, topographic maps, and remote sensing data to create a map of the Roman Empire at its maximum extent at around 150 CE. The resulting map includes an astonishing 299,171.31 km of roads, revealing just how extensive the reach of the empire was.