The Sacramento Juneteenth Festival 2025 was a celebration of freedom and culture, honoring community champions and featuring soulful gospel and music.

This is the filament of X-ray-emitting hot gas that had not been seen before, and contains a chunk of “missing” matter. (Courtesy: ESA/XMM-Newton and ISAS/JAXA) New observations support the idea that ...

When these particles—called cosmic rays—collide with our upper atmosphere, the impact produces a spray of particles that includes muons. Earth’s natural muon drizzle poses no threat.

A type of lichen was able to survive extreme UV radiation in the lab, suggesting that ozone protection might not be required for life on exoplanets.

A long time ago in a galaxy far, far away... Astronomers have observed a rare and spectacular phenomenon dating back over 11 billion years: a quasar, the hyperactive core of a distant galaxy, ...