Graham Hancock is a British writer and journalist who is best known for his works that explore ancient civilizations, alternative history, and the possibility of advanced technological cultures existing in the distant past. He has written several books on these subjects, including "Fingerprints of the Gods" (1995), which argues that ancient civilizations such as the Maya and the Egyptians had access to a advanced technology and knowledge that was lost during a global cataclysm.

Hancock's work is often considered to be controversial and has been criticized by many mainstream archaeologists and historians for being speculative and lacking scientific evidence. However, his ideas and theories have gained a large following and have been the subject of much debate and discussion in both academic and popular circles.

In addition to his writing, Hancock is also a frequent public speaker and has appeared in several documentaries, including the BBC's "The Story of India" and "Underworld: The Mysterious Origins of Civilization." He is a co-founder of the ongoing research project, The War on Consciousness, and is an active member of several organizations that promote alternative and holistic views of history and science.

Overall, Graham Hancock is a well-known figure in the field of alternative history and his work continues to inspire new discussions and debates about the nature of human history and the possibilities of advanced civilizations in the past.