Briefing

Brown dwarfs, also known as “failed stars,” could be corrupted by dark matter and transformed into “dark dwarfs” powered by the universe’s strangest stuff.

The National Weather Service issued timely alerts, meteorologists say, but few were listening in the hours before the early morning flash floods along the Guadalupe River

Brain differences in children and teens who experiment with drugs early show up before they take their first puff or sip

Around seven asteroids or comets are thought to hit Saturn ever year, but we have never spotted one in the act. Now, it seems one astronomer may have caught the moment of impact and the hunt is on for other images to verify the discovery

Suddenly feeling old? Evidence now suggests that rather than a long, steady decline, we dramatically age around three specific times in our lives. Might it be possible to stay younger for longer?

Some numbers are so unimaginably large that they defy the bounds of modern mathematics, and now mathematicians are closing in on a number that may mark the edge of this bizarre abyss

Nature, Published online: 08 July 2025; doi:10.1038/d41586-025-02155-z

Address Colombia’s brain-health crisis

Nature, Published online: 08 July 2025; doi:10.1038/d41586-025-02153-1

Old CO₂ released from rivers complicates evaluations of fossil-fuel emissions

Following a series of eruptions three weeks ago, Mount Lewotobi Laki-laki has begun spewing hot ash and lava again.

Nature, Published online: 08 July 2025; doi:10.1038/d41586-025-02109-5

Tropical regions where heatwaves are already common will be hardest hit by this trend.