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Researchers have struggled for years to understand how mutations in one gene, called LRRK2, can increase the risk of three very different diseases: Parkinson’s (a brain disease), Crohn’s (a gut disease) and leprosy (a peripheral nervous system disease).

Tropical Storm Karen has crossed over Puerto Rico and into the western Atlantic Ocean.

Climate change is profoundly altering the world’s oceans and frozen regions, threatening ecosystems and putting millions of people and their livelihoods at risk, according to a new report from the Intergovernmental Panel on Climate Change.

In a new study, researchers found that unless steps are taken to mitigate climate change, up to 60 percent of current wheat-growing areas worldwide could see simultaneous, severe and prolonged droughts by the end of the century.

More than 50 financial institutions, representing $2.9 trillion in assets, have pledged to disclose the climate impacts of their investments and loans, measuring the greenhouse gas emissions generated by each of the projects they fund, several news outlets reported.