Deimos: Martian Mini-Me?

The United Arab Emirates’s space probe Hope recently flew past Mars' moonlet Deimos and gave us our first look at the moonlet’s far side. The initial spectral analysis suggests Deimos is made out of Martian rock. This contradicts the long-held hypothesis that Deimos was an asteroid captured by Mars' gravity. The discovery has led scientists to rearrange their ideas about the origin of Mars' moons.