Daylight Saving Time Ends Across Most of US
Most Americans gained an hour of sleep overnight as clocks moved back at 2 a.m. Sunday, returning the country to standard time until spring.
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- Blood test flags Alzheimer’s risk a decade early. An international study found a simple blood test can predict Alzheimer’s-related cognitive decline up to 10 years before symptoms appear. The highest-risk group faced a 38% chance of decline.
- Sahara stone turns out to be ancient Mars meteorite. A rosy rock found in the Sahara is a 4.1-billion-year-old Martian meteorite — one of the oldest ever discovered. Scientists call it a “Rosetta stone” view of the Red Planet’s watery youth.
- Voyager 1 briefly goes silent. NASA lost contact with the nearly 50-year-old spacecraft in mid-October before re-establishing communications. Voyager 1, the farthest human-made object in space, is now almost one light-day from Earth.
- Nations recommit to nature goals. Nearly 200 countries reached hard-fought agreements at a U.N. biodiversity summit to put global nature-protection goals back on track. But disputes over financing remain unresolved.
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