Weed Warnings

Results from a recent study by London psychiatrists, published in Biological Psychiatry, suggest that marijuana smokers of a certain genotype may find themselves at a higher risk of cannabis-related psychosis.

The researchers conducted a case-control study of 489 first-episode psychosis patients and 278 control subjects looking at variation at the rs2494732 SNP in the gene AKT1 and how it might be associated with cannabis-associated psychosis.

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Though many details have yet to be worked out, the draft deal for the UK's withdrawal from the EU is giving researchers some hints for what they can expect, Nature News says.

DNA testing has solved a 100-year-old mystery contained in the skull and teeth samples of a now-extinct monkey that once inhabited Jamaica, Gizmodo reports.

As the UN ponders a ban on gene drives, one malaria researcher says there are less dramatic ways to fight the disease in Africa than unleashing GM mosquitoes on a whole continent.

In Nature this week: an improved reference genome of the Aedes aegypti mosquito, genomes of four species of truffles, and more.