Exploring Mercury presents massive engineering hurdles due to extreme temperature fluctuations. However, new mission concepts suggest a specialized rover could operate continuously by traveling precisely along the planet's terminator line. By remaining in the twilight zone between day and night, the robotic explorer would avoid both the searing heat of direct sunlight and the freezing cold of the dark side, enabling long-term scientific studies.

Mercury may not be the long‑assumed “dead” world after all. A new analysis of 100,000 MESSENGER images has revealed about 400 bright streaks - lineae - sliding down crater walls. These features cluster on sun‑facing slopes of younger craters and often originate from hollows linked to volatile loss. The pattern suggests solar heating is driving subsurface materials to escape into space today, not billions of years ago. With ESA’s BepiColombo mission set to re‑image these regions, scientists may soon learn whether new streaks have formed, offering the strongest evidence yet that Mercury remains an active, evolving planet.