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Cities around the globe are fueling evolution among microbes, plants, and animals, driving physical mutations and altering gene flow, according to a new analysis in the journal Science. The projected spread of urbanization in coming decades will continue to reshape and create new species in unexpected ways, the study found.

In northern Montana, Doug and Anna Jones-Crabtree restore soil health while growing organic heirloom and specialty grains, pulse and oilseed crops on 4,700 acres. A thousand miles away in Central Minnesota, the Main Street Project sequesters carbon as it transforms 100 acres of bare ground to a permaculture farm alive with hazelnut trees and foraging chickens.

There are fewer fish in the sea – literally.

Consumer demand and inadequate scientific information has led to overharvesting, reducing fish species and fish stocks around the world.

There is little debate over the link between air pollution and the human respiratory system: Research shows that dirty air can impair breathing and aggravate various lung diseases. Other potential effects are being investigated, too, as scientists examine connections between toxic air and obesity, diabetes and dementia.

Now add to that list psychological distress, which University of Washington researchers have found is also associated with air pollution. The higher the level of particulates in the air, the UW-led study showed, the greater the impact on mental health.

Young hockey players who have suffered concussions may still show changes in the white matter of the brain months after being cleared to return to play, researchers at Western University have found through sophisticated Magnetic Resonance Imaging (MRI) techniques.