Constance Victoria Briggs, who brought us The Moon's Galactic History: A Look at the Moon's Extraterrestrial Past and Its Connection to Earth, continues her exploration into our cosmic connections with her companion book, Earth's Galactic History, and Its Extraterrestrial Connection. In this exciting new work, Briggs examines current research, theories and evidence linking Earth and extraterrestrials, past and present. Some of the topics that Briggs covers include whether the Earth was terraformed by advanced extraterrestrials; the theory that the Earth was seeded with life by other-worldly beings; possible extraterrestrial involvement in the creation of humans and more. She looks at evidence of humans being visited by beings from other worlds, and explores the idea that there was once a battle for Earth. She brings us signs, signals, messages, and clues showing evidence that extraterrestrials are trying to communicate with humans and takes us on a journey beneath the oceans where there is believed to be an extraterrestrial presence. Briggs also investigates the possibility that other worldly beings may be residing inside inner Earth. She delves into how extraterrestrials may be visiting Earth via stargates and portals using what she refers to as the "cosmic freeway." Briggs also examines the possibility that there are extraterrestrials living among us, who they are and what their goals may be when it comes to Earth. Extraordinary events believed to be related to extraterrestrials are also revealed. Briggs takes a look at current research into the UFO/UAP/USO phenomena, detailing descriptions of these enigmatic objects and witness reports. She talks about the possibility of there being an authoritative hierarchy within our galaxy that may include other-worldly federations and groups that are responsible for a galactic community. In the end, Briggs ponders humankind's spacefaring future, looking at the latest information and trends on space travel and what we have to look forward to by way of our expansive universe.