*The Tenth Doctor meets the constantly curious Charles Darwin in the second of three brand-new novellas starring inspiring characters from history.* Some discoveries should never be made... When Charles Darwin takes a break from a long sea voyage to look for shells on the Galapagos Islands, he finds two things that really shouldn't be there. The first is a sunbathing Doctor. The second is a fresh Silurian skull . . . When more Silurians are discovered...