Surprisingly big organic molecules on Mars: A hint of life?

NASA’s Curiosity rover has found the largest organic molecules on Mars we’ve yet seen. They seem to be the remains of fatty acids. Video via NASA Goddard.

• Did life ever exist on Mars? Rovers have found various types of organic molecules, but whether any of them relate to ancient life remains unknown.
• NASA’s Curiosity rover has now discovered the largest known organic molecules to date. They are three kinds of long-chained carbon molecules that scientists say are the remains of fatty acids.