NASA's Curiosity rover snapped an intriguing picture of a tiny Martian rock that looks surprisingly like a fossilized book on the surface of the Red Planet.
The rover captured the image of the peculiar book-like rock on April 15 — the 3,800th Martian day, or sol, of its mission — using the Mars Hand Lens Imager (MAHLI) on the end of its robotic arm, according to NASA. The red rock looks like two halves of an open book with a single page that has frozen halfway through being turned.
