Mars is spinning faster and faster, shortening the length of its days. The Red Planet's rotation is increasing by around 4 milliarcseconds per year. A milliarcsecond is a unit of angle, with one ...

(Phys.org) —Exceptional structures deposited and shaped by water and winds adorn these interlocking craters and sculpt radiating patterns in the sands of Mars. On Mars's poles there are ice caps of ...