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Interstellar solar sails hit a strange problem at 75% of light speed
Science News

Interstellar solar sails hit a strange problem at 75% of light speed

Solar sails pushed by powerful lasers could reach incredible speeds, but relativity may eventually make the light itself work against them. At around 75% of the speed of light, scattered photons can begin creating drag, adding a surprising obstacle to interstellar travel.

📅 2026-09-02 14:51:21    •    ScienceDaily
Money problems may age your brain faster
Science News

Money problems may age your brain faster

Persistent financial hardship in early and middle adulthood was linked to poorer thinking skills by the 50s and more signs of brain aging later in life. Researchers say years of chronic stress and financial worry may gradually take a toll on the brain.

📅 2026-09-02 14:32:26    •    ScienceDaily
Alzheimer’s may leave a mark on the brain long before plaques appear
Science News

Alzheimer’s may leave a mark on the brain long before plaques appear

Brain changes associated with Alzheimer’s may begin at least seven years before amyloid plaques become detectable with current PET scans. Researchers uncovered the signal by tracking healthy older adults with repeated brain imaging over nearly 20 years. The discovery could help scientists identify Alzheimer’s earlier and suggests that important disease processes may start before visible plaque buildup.

📅 2026-09-02 13:33:57    •    ScienceDaily
A coffee-table-size scorpion roamed Earth before forests existed
Science News

A coffee-table-size scorpion roamed Earth before forests existed

A meter-long scorpion with massive pincers stalked ancient Britain 415 million years ago, long before forests and the better-known age of giant insects. Its surprising size and possible semi-aquatic lifestyle could reshape ideas about how early arthropods became giants.

📅 2026-09-02 13:23:16    •    ScienceDaily