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Deeper Sleep Stages Boost Problem-Solving Insights, Study Finds

Slashdot.org - Fri, 06/27/2025 - 10:20
A new study challenges previous research about which sleep stages help people achieve breakthrough moments in problem-solving. Researchers found that N2 sleep, a deeper stage of non-REM sleep, significantly increased participants' likelihood of experiencing sudden insights during a perceptual task. The preregistered study involved 90 participants who performed a visual pattern recognition task before and after a 20-minute daytime nap while researchers monitored their brain activity with EEG. Participants who reached N2 sleep showed an 85.7% rate of achieving insights about a hidden strategy in the task, compared to 63.6% for those who only reached N1 sleep (the first stage of non-rapid eye movement sleep) and 55.5% for participants who remained awake. The findings contradict earlier work by Lacaux and colleagues, which suggested that lighter N1 sleep promoted insight while deeper sleep hindered it. News coverage: Stuck on a problem? Take a nap!

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Starlink Helps Eight More Nations Pass 50% IPv6 Adoption

Slashdot.org - Fri, 06/27/2025 - 09:40
Eight nations have surpassed 50% IPv6 deployment since June 2024, bringing the total number of countries in the majority IPv6 club to 21, according to the Internet Society. Brazil, Guatemala, Hungary, Japan, Mexico, Puerto Rico, Sri Lanka, and Tuvalu all crossed the threshold over the past year. Tuvalu's adoption coincided with the arrival of Elon Musk's Starlink satellite broadband service, which operates as IPv6-only. The Internet Society's Pulse platform found no IPv6 deployment in the Pacific nation in June 2024, but Starlink now holds 88% market share there and 59% of Tuvalu's internet connections use IPv6. France moved from third place to tie with India for the global lead at 73% IPv6 deployment. Japan rebounded from 49% to 55%, returning to the 50% club after dropping below the mark in mid-2024. Puerto Rico climbed from 49% to 53%. Thailand appears positioned to join next at 49% deployment, followed by Estonia at 46% and the United Kingdom at 45%.

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