April 11, 2026

Weak gravitational waves from the early universe may hint at how dark matter first formed. Illustration: depositphotos.com

Gravitational waves from the early universe may have created dark matter

A new paper suggests that a weak background of stochastic gravitational waves from the early universe created low-mass particles that may have later become the dark matter that shapes galaxies and large cosmic structures.
Studying while listening to music. Illustration: depositphotos.com

The sounds in the background

Hebrew University study: “Speech-matched” background music improved word recall more than silence
Flu vaccine. A strong dose is recommended for adults. Illustration: depositphotos.com

Study: High-dose flu vaccine linked to nearly 55% reduction in Alzheimer's risk

An analysis of data from nearly 200 people aged 65 and over found that a high dose of flu vaccine was associated with a lower risk of Alzheimer's, especially in women. * The researchers emphasize that
Seconds before the Artemis II spacecraft lands. Screenshot: NASA

Live broadcast: Artemis II landed safely

Orion's first crewed deep-space test flight tested launch, flight, return and recovery systems — paving the way for the next phase of the lunar return program