Space probes have found some really cool things during their journeys. Here are a few highlights:

• Water on Mars: Scientists found signs that water once flowed on Mars. They discovered old riverbeds and ice at the poles.
• Pluto’s Heart: The New Horizons probe showed us a big, heart-shaped glacier on Pluto. It’s called Sputnik Planitia, and it tells us that Pluto is still active in some ways.
• Organic Molecules on Comets: The Rosetta mission found complex carbon-based molecules on comets. This shows that comets might have building blocks for life.

These discoveries help us learn a lot more about our solar system!