Researchers have identified, for the first time, the likely origin of the cross-reactivity between cypress pollen, peaches and citrus fruits.

When we have a new experience, the memory of that event is stored in a neural circuit that connects several parts of the hippocampus and other brain structures. Each cluster of neurons may store different aspects of the memory, such as the location where the event occurred or the emotions associated with it.

Neuroscientists who study memory have long believed that when we recall these memories, our brains turn on the same hippocampal circuit that was activated when the memory was originally formed. However, MIT neuroscientists have now shown, for the first time, that recalling a memory requires a “detour” circuit that branches off from the original memory circuit.

The expansion of wind and solar energy, and the resulting avoided emissions from fossil fuels, helped prevent up to 12,700 premature deaths in the U.S. from 2007 to 2015, according a new study in the journal Nature Energy.

The ancient Romans were famous for their advanced water supply. But the drinking water in the pipelines was probably poisoned on a scale that may have led to daily problems with vomiting, diarrhoea, and liver and kidney damage. This is the finding of analyses of water pipe from Pompeii.

- The concentrations were high and were definitely problematic for the ancient Romans. Their drinking water must have been decidedly hazardous to health.

Gastric carcinoma is one of the most common causes of cancer-related deaths, primarily because most patients present at an advanced stage of the disease. The main cause of this cancer is the bacterium Helicobacter pylori, which chronically infects around half of all humans. However, unlike tumour viruses, bacteria do not deposit transforming genes in their host cells and how they are able to cause cancer has so far remained a mystery. An interdisciplinary research team at the Max Planck Institute in Berlin in collaboration with researchers in Stanford, California, has now discovered that the bacterium sends stem cell renewal in the stomach into overdrive – and stem cell turnover has been suspected by many scientists to play a role in the development of cancer. By showing that the stomach contains two different stem cell types, which respond differently to the same driver signal, they have uncovered a new mechanism of tissue plasticity. It allows tuning tissue renewal in response to bacterial infection.

In a new study, researchers report people who have experienced an aneurysm have another reason to quit smoking.

A new simulation of how the costs and the course of the dementia epidemic affect U.S. families finds that neurodegenerative conditions can more than double the health care expenditures of aging and that the vast majority of that financial burden remains with families rather than government insurance programs.

It’s not a bird or a plane but it might be a solar storm. We like to think of astronauts as our super heroes, but the reality is astronauts are not built like Superman who gains strength from the sun. In fact, much of the energy radiating from the sun is harmful to us mere mortals.

Research conducted in a collaboration between Drs. Dun Mao, a researcher in Dr. Bruce McNaughton’s lab at the Canadian Centre for Behavioural Neuroscience at the University of Lethbridge, and Steffen Kandler, a researcher in Professor Vincent Bonin’s lab at Neuro-Electronics Research Flanders (NERF) in Belgium, has found neural activity patterns that may assist with spatial memory and navigation.

Their study, Sparse orthogonal population representation of spatial context in the retrosplenial cortex, has been published in Nature Communications.

Elemental sulfur, the most heavily used pesticide in California, may harm the respiratory health of children living near farms that use the pesticide, according to new research led by UC Berkeley.

In a study of children in the Salinas Valley’s agricultural community, researchers found significant associations between elemental sulfur use and poorer respiratory health. The study linked reduced lung function, more asthma-related symptoms and higher asthma medication use in children living about a half-mile or less from recent elemental sulfur applications compared to unexposed children.