History
History (from Greek ἱστορία, historia, meaning "inquiry, knowledge acquired by investigation") is the study of the past as it is described in written documents. Events occurring before written record are considered prehistory. It is an umbrella term that relates to past events as well as the memory, discovery, collection, organization, presentation, and interpretation of information about these events. Scholars who write about history are called historians.
Worlds
Worlds is a collection of science fiction and fantasy short stories by Eric Flint. It was first published in hardcover and ebook format by Baen Books on February 1, 2009; a paperback edition was issued by the same publisher in October 2011.