1 Trilobite Mass Mortality Plate

Early Ordovician Period (approx. 480 million years ago), Fezouata Formation, Drâa-Tafilalet Region, Morocco

2 Brittle Star Pair

Late Ordovician Period (approx. 450 million years ago), Ktaoua Formation, Erfoud Region, Morocco

3 Much Wenlock Limestone Fossil Plaque

Silurian Period (approx. 426-423 million years ago), Much Wenlock Limestone Formation, Wren's Nest, West Midlands, England

4 Sea Lily (Crinoid) Colony on Driftwood

Early Jurassic Period (approx. 180 million years ago), Holzmaden, Germany

5 Monumental Sea Lily (Crinoid) Colony

Early Jurassic Period (approx. 180 million years ago), Holzmaden, Germany

6 Sea Lily (Crinoid) Mural With Belemnite

Early Jurassic Period (approx. 180 million years ago), Holzmaden, Germany

7 Parkinsonia Ammonite Block With Fossil Mollusks

Middle Jurassic Period, Bajocian Stage (approx. 171-168 million years ago), Fresney-le-Puceux, Normandy, France

8 Large Lobolytoceras Ammonite

Late Jurassic Period, Oxfordian Stage (approx. 161-154 million years ago), Sakaraha, Madagascar

9 Large Kranaosphinctes Ammonite With Fossil Mollusk

Late Jurassic Period, Oxfordian Stage (approx. 161-154 million years ago), Madagascar

10 Cleoniceras Ammonite

Early Cretaceous Period, Albian Stage (approx. 110 million years ago), Mahajanga, Madagascar

11 Ceratosaurus

A Mounted Juvenile Ceratosaurus Skeleton, Late Jurassic, Kimmeridgian Stage (approx. 154-149 million years ago)

12 Pterodactylus Fossil Plates (Positive & Negative)

Late Jurassic Period, Kimmeridgian Stage (approx. 155-150 million years ago), Solnhofer Plattenwerk Victor Henle Quarry, Mörnsheim, Eichstätt District, Bavaria, Germany

13 Horseshoe Crab Trace Fossil With Preserved "Death March"

Late Jurassic Period, Kimmeridgian Stage (approx. 155-150 million years ago), Solnhofen, Germany

14 Large Fossil Ichthyodectid Fish

Late Cretaceous Period (approx. 87-82 million years ago), Niobrara Formation, Kansas

15 Brachylophosaurus Tail Vertebrae With Skin Impressions and Preserved Tendons

Late Cretaceous Period (approx. 78-75 million years ago), Judith River Formation, Phillips Co., Montana

16 Very Large Iridescent Ammonite

Late Cretaceous Period (approx. 71 million years ago), Bearpaw Formation, Alberta, Canada

17 Gorgosaurus Claw

Late Cretaceous Period (approx. 76 million years ago), Judith River Formation, Hill Co., Montana

18 The Skull of a Pachycephalosaurus

Late Cretaceous Period, Maastrichtian Stage (approx. 72 to 66 million years ago), Hell Creek Formation, Perkins Co., South Dakota

19 Articulated Tyrannosaurus Rex Foot

Late Cretaceous Period (approx. 67 million years ago), Hell Creek Formation, Garfield Co., Montana

20 The Dentary of Tyrannosaurus Rex

Late Cretaceous Period, Maastrichtian Stage (approx. 67 million years ago) Hell Creek Formation, Dawson County, Montana

21 Exceptionally Large Tooth of a Tyrannosaurus Rex

Late Cretaceous Period (approx. 67 million years ago) Hell Creek Formation, Garfield Co., Montana

22 Tyrannosaurus Rex Tooth

Late Cretaceous Period (approx. 67 million years ago), Lance Formation, Niobrara Co., Wyoming

23 Triceratops Brow Horn

Late Cretaceous Period (approx. 67 million years ago), Lance Formation, Niobrara Co., Wyoming

24 Nanotyrannus Tibia

Late Cretaceous Period (approx. 67 million years ago), Lance Formation, Niobrara Co., Wyoming

25 Uncommonly Large Lotus Lily Pad With Fossil Fish

Early Eocene Epoch (approx. 52-48 million years ago), Green River Formation, Wyoming

26 Fossil Palm Frond Plates (Positive & Negative)

Early Eocene Epoch (approx. 52-48 million years ago), Green River Formation, Lincoln Co., Wyoming

27 Multi-Fish Triptych Mural

Early Eocene Epoch (approx. 52-48 million years ago), Green River Formation, Lincoln Co., Wyoming

28 Fossil Fish Mural

Early Eocene Epoch (approx. 52-48 million years ago), Green River Formation, Lincoln Co., Wyoming

29 Fossil Stingray

Early Eocene Epoch (approx. 52-48 million years ago), Green River Formation, Lincoln Co., Wyoming

30 Sandstone "Picturestone" Slab

Early Cretaceous Period (approx. 120 million years ago), Kanab, Utah

31 Very Large Gogotte Sandstone Formation

Oligocene Epoch (approx. 30 million years ago), Fontainebleau, France

32 Large Gogotte Sandstone Formation

Oligocene Epoch (approx. 30 million years ago), Fontainebleau, France

33 Gogotte Sandstone Formation

Oligocene Epoch (approx. 30 million years ago), Fontainebleau, France

34 Massive Gogotte Sandstone Formation

Oligocene Epoch (approx. 30 million years ago), Fontainebleau, France

35 Gogotte Sandstone Formation

Oligocene Epoch (approx. 30 million years ago), Fontainebleau, France

36 Gogotte Sandstone Formation

Oligocene Epoch (approx. 30 million years ago), Fontainebleau, France

37 Mural of Fossilized Saint-Jacques Shells

Early Miocene Epoch, Burdigalian Stage (approx. 20-16 million years ago), Lacoste Quarry, Vaucluse, France

38 Statue of Fossilized Saint-Jacques Shells

Early Miocene Epoch, Burdigalian Stage (approx. 20-16 million years ago), Lacoste Quarry, Vaucluse, France

39 Bouquet of Fossilized Saint-Jacques Shells

Early Miocene Epoch, Burdigalian Stage (approx. 20-16 million years ago), Lacoste Quarry, Vaucluse, France

40 Megalodon Shark Tooth — Virginia

Miocene Epoch (approx. 23-5.3 million years ago), Eastover Formation, Nottoway River, Southampton Co., Virginia

41 Megalodon Shark Tooth — Georgia

Miocene Epoch (approx. 23-5.3 million years ago), Hawthorne Formation, St. Marys River, Camden Co., Georgia

42 Megalodon Shark Tooth — South Carolina

Miocene Epoch (approx. 23-5.3 million years ago), Ashepoo River, Colleton Co., South Carolina

43 Megalodon Shark Tooth — Georgia

Miocene Epoch (approx. 23-5.3 million years ago), Hawthorne Formation, Cane Patch Creek, Chatham Co., Georgia

44 Petrified Slice of Colla Wood

Miocene Epoch (approx. 23-5.3 million years ago), Zile, Turkey

45 Large Cave Bear Skeleton

Late Pleistocene Epoch (approx. 30,000 years ago), Eastern Europe

46 Paleolithic (Acheulean) Banded Flint Handaxe

Lower Paleolithic (approx. 700,000-300,000 years ago), Longueil-Sainte-Marie, Oise, France

47 Paleolithic (Acheulean) Flint Handaxe With Fossil Inclusions

Lower Paleolithic (approx. 700,000-300,000 years ago), France

48 Paleolithic (Acheulean) Quartzite Handaxe

Lower Paleolithic (approx. 700,000-300,000 years ago), Oise, France