curiosity

How curiosity works: the information-gap theory, dopamine reward circuits, three types of curiosity, the brain regions involved, and why the drive to learn persists across the lifespan. The neuroscience and psychology of the desire to know.

NASA's Curiosity rover detected methane spikes in Mars' atmosphere—evidence of possible microbial life or geological processes that challenge understanding of the Red Planet.

Five rovers have driven on Mars over 30 years. They've found water, organic molecules, and possibly biosignatures. Here's what each rover discovered and what's coming next.