It's another sunny day on Mars, according to a chirpy AI assistant named Sandy.

Opportunity and its twin, Spirit, were only expected to last some 90 days on Mars.

I went outside, into my last day on Mars.

Last Days on Mars Directed by Ruairi Robinson.

It was a morning that might have been a Monday or a Tuesday or any day on Mars.

Based on their success in the simulated Mars chamber, Johnson thinks they could last more than 300 days on Mars.