Iron in the surface rocks reacted with trace oxygen long ago, forming rust (iron oxide). Dust storms kick this rusty powder into the atmosphere, giving the whole sky a butterscotch hue. The surface is literally rusted — a planet-wide oxidation event.

It's likely extinct, but some evidence suggests Mars may still have subsurface magma. If it ever erupted again, lava flows would be enormous due to the low gravity. The volcano is so large that you could stand on its slopes and not see the edges — the curvature would hide them behind the horizon.

No definitive evidence yet, but NASA's Perseverance rover is collecting samples to return to Earth. Methane spikes in the atmosphere hint at possible microbial activity below the surface. If life exists, it's likely deep underground where liquid water might still persist.

Phobos is being torn apart by Mars's gravity. When it reaches the Roche limit, it will shatter into a temporary ring around Mars, then rain debris down on the surface for millions of years. Future Martians will witness a spectacular — and dangerous — light show.

About 6-9 months each way with current technology. The ideal launch window opens every 26 months when Earth and Mars align. Astronauts will face radiation exposure, muscle loss from low gravity, and psychological challenges of isolation.