A ripping yarn about the hugely successful New Horizons mission to Pluto and the Kuiper Belt, by Alan Stern, principal investigator and astrobiologist David Grinspoon. After 25 years of painstaking work, scientists involved were astounded to find that the icy world has been geologically active throughout its four billion year history. No wonder they say that Pluto is the new Mars!
Further Reading
Chasing New Horizons: Inside the Epic First Mission to Pluto