Science & Technology — November 1, 2026

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.

Science Daily · Read more ↗

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.

Smithsonian · Read more ↗

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.

Interesting Engineering · Read more ↗

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.

Phys.org · Read more ↗