Animals of the Past

Written when 'dinosaur' was still a new word in most homes: the American Museum's own guide to sea-serpents of Kansas, birds with teeth, and why great creatures vanish — with Charles R. Knight's famous restorations.

This site is the complete 1922 book Animals of the Past, page by page as originally printed — period spelling, remedies and opinions included. About this edition →

◆ A Cabinet of Curiosities ◆

The Bone Room

What 1901 knew, guessed, and got gloriously wrong.

Open The Bone Room →
A Charles R. Knight restoration from the 1922 book

Browse the Book

Introduction

2 pages

Fossils, and How They Are Formed

1 page

The Earliest Known Vertebrates

1 page

Impressions of the Past

2 pages

Rulers of the Ancient Seas

4 pages

Birds of Old

3 pages

Flying Reptiles

3 pages

The Dinosaurs

3 pages

Reading the Riddles of the Rocks

1 page

Feathered Giants

4 pages

The Ancestry of the Horse

3 pages

The Mammoth

1 page

See the full table of contents →

Highlights

The Earliest Known Vertebrates

"We are the ancients of the earth And in the morning of the times."

The Mammoth

"His legs were as thick as the bole of the beech, His tusks as the buttonwood white, While his lithe trunk wound like a sapling…

The Mastodon

who shall place A limit to the giant's unchained strength?"

Reading the Riddles of the Rocks

"And the first Morning of Creation wrote What the Last Dawn of Reckoning shall read."

The Ancestry of the Horse

"Said the little Eohippus I am going to be a horse And on my middle finger-nails To run my earthly course."

The Dinosaurs

"Shapes of all sorts and sizes, great and small."

Meet a vanished creature

How Big Was It?

Pick a creature and see it beside a six-foot person — every measurement the book's own, from Brontosaurus to the Mammoth.

Try it
13Chapters
1922Year
34Pages
Take the quiz Search the book
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.