NASA's Curiosity rover captured images of a wind-eroded, coral-shaped rock called 'Paposo' on Mars, revealing how water and wind have shaped the planet's surface over billions of years, similar to processes on Earth.
NASA's Curiosity rover captured an image of a tiny Martian rock that looks like a fossilized book on the surface of the Red Planet. The rock is just 1 inch across and looks like two halves of an open book with a single page that has frozen halfway through being turned. The peculiar rock is made from minerals that were left behind by ancient water and is just one of many strangely shaped rocks found on Mars. Curiosity has also captured images of mineral formations and larger-scale shapes carved out by ancient water on the Red Planet.