How Big Was It?
Lucas loved a good measurement: thigh bones by the foot, tusks by the pound, wing-spreads checked against the albatross. Pick a creature and stand next to it — every figure below is the book's own, and every creature links to its chapter.
Rights & ReuseThe complete text of Animals of the Past (1901) is in the public domain in the United States — like all works published before 1928 — and is free to read, download, quote, teach from, and reuse. This digital edition (its transcription, restored plates, and site design) is © 2026 PhotoOpAI, and any editorial commentary we add is clearly marked as ours; the underlying public-domain text carries no such restriction.