Science & Technology — August 7, 2026

AI designs first synthetic virus never found in nature. A Stanford-led team used generative AI to create a synthetic bacteriophage — an organism that has never existed — raising both medical hopes and biosecurity concerns.

Bacteriophages are viruses that infect bacteria and have long been studied as potential alternatives to antibiotics. The Stanford team's use of generative AI to design one with no natural precedent marks a departure from previous synthetic biology work, which typically modified existing organisms. Axios notes the advance simultaneously opens possibilities for targeted therapies and prompts concern about whether similar methods could be misused.

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South Korea's lunar orbiter photographs SpaceX rocket's moon impact crater. South Korea's Danuri orbiter captured before-and-after images of the fresh crater left when a stray Falcon 9 upper stage struck the moon on August 5.

The Falcon 9 upper stage had been drifting uncontrolled for years before its unplanned lunar impact on August 5. Danuri, which has been orbiting the moon since late 2022, was positioned to image the site before and after the strike, according to Phys.org. The crater images provide researchers with a rare, precisely dated data point for studying how such impacts alter the lunar surface.

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Brain's immune cells shift around age 50, study finds. Around age 50, the brain's memory center loses longtime immune cells and replaces them with more inflammatory ones — a change that may help explain the onset of cognitive decline.

The study, reported by Science Daily, centers on the hippocampus, the brain region most associated with memory formation. Researchers found that the longtime resident immune cells — microglia — are gradually replaced around age 50 by cells with a more inflammatory profile. The finding could inform future research into why age-related cognitive decline tends to accelerate during that same life stage.

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Wearable ultrasound patch extends REM sleep without drugs. A wearable patch cut time to REM sleep by 43 minutes and lengthened REM duration in a 28-person study, offering a drug-free path to better sleep quality.

The patch works by delivering low-intensity ultrasound, a non-invasive method that requires no medication or implanted hardware. Science Daily reports the 28-participant study measured both the latency to REM sleep and its total duration, finding improvements on both measures. Researchers said the small sample size means larger trials will be needed before the device could be considered for broader clinical use.

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