Constructed wetlands (CWs) effectively remove low concentrations of dissolved carbon, nitrogen, and phosphorus pollutants, and prevent contamination and algal blooms from occurring in freshwater bodies. A team of Chinese researchers have identified factors that affect the removal efficacy of CWs and listed strategies to make CWs more effective. These findings can increase the deployment of CWs across diverse environments.

The arrival of agriculture coincided with a sharp rise in a gene variant that protected against the virus that causes winter vomiting, researchers from Karolinska Institutet and Linköping University report after analysing DNA from over 4,300 prehistoric individuals and cultivating ”mini guts”.