Many people take aloe vera supplements to stay healthy — more specifically to keep their guts healthy. But now, researchers at the US National Toxicology Program have found that too much of the extract can cause tumors in the intestines instead of keeping them healthy, reports New Scientist's Peter Aldhous. For the study, rats were given drinking water spiked with high doses of a whole-leaf extract of aloe over the course of two years.

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Science speaks with the University of Michigan's Jedidiah Carlson, who has tracked population genetic discussions at white nationalist sites.

Gene therapies could qualify for a faster US Food and Drug Administration approval process, according to Stat News.

NPR reports that the US House of Representatives has passed a bill to enable terminally ill patients access to experimental drugs.

In Genome Research this week: inversion variants mapped in human, non-human primate genomes; transcriptome profiling of maize, sorghum; and more.