Astronomy
Mars’ hills keep streaking in the dark—no water needed.
We thought water—turns out, it’s mostly wind. For years, many of us pictured thin films of briny water painting those long, dark lines down Martian hills. This new work flips that story. Think of a kitchen pan sprinkled with cocoa powder: nudge it, and a patch slides, revealing the shiny surface beneath. On Mars, it’s […]
Read more →