First up on the podcast, a new path to calculating the Hubble constant. This value for the universe’s speed of expansion is typically determined in one of two ways, one favored by cosmologists, the other by astronomers. But the resulting values from these methods are consistently different. Staff Writer Daniel Clery joins host Sarah Crespi to discuss how reappearing bursts from deep space, lensed by gravity, could resolve the dispute over the speed of the expanding universe.

Next on the show, freelance producer Elah Feder talks with Mauro Costa-Mattioli, principal investigator at Altos Labs’ Institutes of Science, about tuning the “integrated stress response” (ISR) in mouse brains. The ISR pathway turns off much of protein synthesis in cells as a response to stressors such as viral infections or oxygen deprivation. The ISR is overactive in some models of cognitive dysfunction—suggesting the downregulated protein synthesis may hamper brain functions such as memory formation. In his paper, Costa-Mattioli and colleagues show turning on the ISR pathway causes memory problems in mice and turning off the ISR can restore function in mouse models of Alzheimer’s disease and Down syndrome. Although this research was in mice, it suggests cognitive dysfunction associated with many different disorders may involve the ISR—making it a good therapeutic target.

This week’s episode was produced with help from Podigy.

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