The search for signs of life on Mars continues to yield promising data.

NASA's Curiosity rover has uncovered a range of organic molecules on Mars - some of the same kinds of chemicals that, on Earth, are considered the basic building blocks of life.

Five of the seven diverse organic compounds confirmed by the six-wheeled rover in rock that formed in a dried lakebed near the planet's equator ‌had never previously been identified on Mars, the resea...