In 2022, an 800-gram pink rock was found in the Sahara Desert; NASA-funded researchers have now confirmed it came from Mars more than 4.1 billion years ago and preserves signs of the planet's ancient water

• Discovered in 2022, the 800-gram rock has since turned out to be one of the oldest Martian meteorites ever identified on Earth.
• Its mineral composition contains evidence of ancient volcanic activity and interactions between water and rock, offering scientists a rare opportunity