Abbiamo sempre sbagliato sul perché Marte è rosso?
Global Mars in colourAlt-text: This image shows the globe of Mars set against a dark background. The disc of the planet features yellow, orange, blue and green patches, all with an overall muted grey hue, representing the varying composition of the surface.CREDIT: ESA/DLR/FU Berlin/G. MichaelLICENCE: CC BY-SA 3.0 IGO or ESA Standard Licence