Last week, beachgoers off an Iranian island were met by an eerie sight. The sand turned bright red as if the shoreline was ...

Now, he says, "our understanding of why Mars is red has been transformed." The new explanation for the reddish color – the rusty-colored dust known as ferrihydrite – also will help our ...

Essentially, it’s rust. That red-tinted iron oxide disintegrated into dust and spread across the planet on wind currents for billions of years—as it continues doing today. However, different ...

Thanks to the fleet of spacecraft that have studied the planet over the last decades, we know that this red color is due to rusted iron minerals in the dust. That is, iron bound up in Mars's rocks ...