Rock salt remains a crystal until the humidity reaches 70 percent, which doesn’t happen much during the winter. But magnesium chloride dissolves when there is only about 20 to 30 percent humidity.

Despite the name, kosher salt isn't necessarily "kosher"—it's named for its traditional use in the koshering process, where large salt crystals draw blood from meat.

Much of what we salt the Earth with every winter comes from underground networks of salt crystal that formed when various ancient seas dried up. As natural as it may be, rock salt is bad for the ...

Tiny salt grains discovered in samples returned by the Hayabusa mission imply liquid water could be common in the largest solar system space rock population.

A bizarre Martian rock looks just like coral — but formed geologically. Here's how The newly-dubbed "Blackthorn Salt" is comprised of minerals that were formed when Mars rocks interacted with water ...

Scientists have discovered salt crystals in samples from asteroid Itokawa, collected by Hayabusa in 2010. The space rock is an S-type asteroid, which as a class has been considered quite dry, with ...

Fluid inclusions in halite with microorganisms. A research team documented tiny bubbles in 830-million-year-old salt crystals of central Australia that contain traces of cells and algae. This ...

This 830-million-year-old crystal might contain life. And we're about to open it From lemons to ham, salt is a handy food preservative. But researchers studying some really old salt crystals found ...