Acanthostega gunnari
cast of skeleton
Devonian
amphibian
Aceraspis robustus
cast
Silurian
fish
Actinostroma
fossil
Devonian
Stromatoporoid
Adapis
cast of skull and jaw
Tertiary
primate
Adrianites
fossil
Permian
cephalopod
Aegyptopithecus
cast of skull and jaw
Tertiary
primate
Agathiceras
fossil
Permian
cephalopod
Agathiceras
fossil
Pennsylvanian
cephalopod
Agoniatites
fossil
Devonian
cephalopod
Albertella
fossil
Cambrian
arthropod
Aleurognathus
cast of skull
Permian
mammal-like reptile
Algal Stromatolites
fossil
PreCambrian
Prokaryote
Allosaurus
sculpture of skull and jaw
Jurassic
dinosaur
Allosaurus fragilis
cast of hand
Jurassic
v
dinosaur
Ameicaspis
fossil
Silurian
fish
Ameura
fossil
Pennsylvanian
arthropod
Amphibamus lyelli
cast of skeleton
Pennsylvanian
amphibian
Anomalocaris briggsi
model replica
Cambrian
primitive arthropod
Anomoepus
cast of track
Jurassic
dinosaur
Anteosaurus
cast of skull and jaw
Permian
mammal-like reptile
Arandaspis
cast of whole fish
Ordovician
fish
Archaeocidaris
fossil
Pennsylvanian
echinoderm
Archaeocyathus robocathus
Archaeocyathid
Cambrian
archaeocyathid
Archaeopteryx lithographica
cast of Berlin specimen
Jurassic
bird
Archeria
cast of skull
Permian
amphibian
Arctoceras
fossil
Triassic
cephalopod
Arctops
cast of skull and jaw
Permian
mammal-like reptile
Ardipithecus ramidus
cast of skull
Terriary
primate
Arthrocantha
fossil
Devonian
echinoderm
Artinskia artiensis
fossil
Permian
cephalopod
Artinskia falx
fossil
Permian
cephalopod
Asaphus
fossil
Ordovician
arthropod
Astraspis desirderata
fossil fragments of bony plates
Ordovician
fish
Astraspis desirderata
fossil fragments of bony plates
Ordovician
fish
Astrocoenia
fossil
Quaternary
coral
Aturia
fossil
Tertiary
cephalopod
Aturia
fossil
Tertiary
cephalopod
Australobarbarus platycephalis
cast of skull and jaw
Permian
mammal-like reptile
Australochelys africanus
cast of skull
Jurassic
reptile
Australopithecus afarensis
cast of skull and jaw (Lucy)
Tertiary
primate
Australopithecus africanus
reconstruction of skull
Quaternary
primate
Australopithecus boisei
reconstruction of skull
Quaternary
primate
Avitelmessus
fossil
Cretaceous
arthropod
Avitelmessus
fossil
Cretaceous
arthropod
Axlerodichthys araripensis
photo
Cretaceous
fish
Baculites
fossil
Cretaceous
cephalopod
Bauria
cast of skull
Triassic
mammal-like reptile
Beetle larva
fossil
Cretaceous
arthropod
Belesodon
cast of skull
Triassic
mammal-like reptile
Beloceras
fossil
Devonian
cephalopod
Biarmosuchus
cast of skull
Permian
mammal-like reptile
Birkenia elegans
cast
Silurian
fish
Boesites scotti
fossil
Pennsylvanian
cephalopod
Boesites scotti
fossil
Pennsylvanian
cephalopod
Bothriolepis canadensis
cast of head and body shield
Devonian
fish
Botryocrinus
fossil
Devonian
echinoderm
Bradysaurus
cast of skull
Permian
reptile
Breviphillipsia
fossil
Mississippian
arthropod
Breviphillipsia
fossil
Mississippian
fossil
Broomicephalus laticeps
cast of skull
Permian
mammal-like reptile
Bug
arthropod
Cretaceous
fossil
Bullacephalus
cast of skull and jaw
Permian
mammal-like reptile
Burmirhynchia
fossil
Jurassic
brachiopod
Calamopleurus
cast of whole fish
Cretaceous
fish
Calycocrinus
fossil
Permian
echinoderm
Calymene
fossil
Ordovician
arthropod
Camarasaurus
cast of tooth and skull
Jurassic
dinosaur
Cambrocyathus
Archaeocyathid
Cambrian
archaeocyathid
Cameroceras
fossil
Ordovician
cephalopod
Camptosaurus
cast of skull
Jurassic
dinosaur
Caprina adversa
fossil
Cretaceous
bivalve
Captorhinus
cast of skull
Permian
reptile
Captorhinus insignis
cast of skull
Permian
reptile
Carcharocles megalodon
fossil
Tertiary
fish
Cardiella ganti
fossil
Pennsylvanian
cephalopod
Cardisuctor
photo
Mississippian
fish
Carpolestes dubius
cast of left mandible
Tertiary
primate
Carpolestes hazelae
cast of left mandible
Tertiary
primate
Catopithecus
casts of skull and mandible
Tertiary
primate
Caturus
casts of skeleton
Jurassic
fish
Cenoceras
fossil
Jurassic
cephalopod
Cenoceras
fossil
Jurassic
cephalopod
Centroceras
fossil
Devonian
cephalopod
Cephalaspis powrei
cast of skeleton
Silurian
fish
Cephalaspis
uternaria
cast of head
Devonian
fish
Chanaresuchus bonapartei
cast of skull and jaw
Triassic
reptile
Charnia masoni
cast
Precambrian
primitive coral
Chebbites
fossil
Devonian
cephalopod
Cheirocanthus
cast of whole fish
Devonian
fish
Cheirolepis
photo of whole fish
Devonian
fish
Chirothermium
cast of archosaur track
Triassic
reptile
Cibolites
fossil
Permian
cephalopod
Cibolocrinus
fossil
Pennsylvanian
echinoderm
Cinomia vestali
fossil
Tertiary
cephalopod
Cistecephalus
cast of skull
Permian
mammal-like reptile
Cleoneceras
fossil
Cretaceous
cephalopod
Cleoneceras
fossil
Cretaceous
cephalopod
Clidochirus
fossil
Ordovician
echinoderm
Clypeus
fossil
Jurassic
echinoderm
Coccoderma
cast of skeleton
Jurassic
fish
Coccoderma
cast of skeleton
Jurassic
fish
Coccosteus cuspidatus
photo
Devonian
fish
Coelema
fossil
Tertiary
arthropod
Coelophysis
cast of skull
Triassic
dinosaur
Coelstearoceras
fossil
Pennsylvanian
cephalopod
Coelstearoceras
fossil
Pennsylvanian
cephalopod
Conchidium
fossil
Silurian
brachiopod
Confusciusornis
cast of skeleton
Cretaceous
bird
Cordillerites
fossil
Triassic
cephalopod
Cornellites
fossil
Devonian
bivalve
Cornuboniscus
fossil
Mississippian
fish
Cornuproetus
fossil
Devonian
arthropod
Cotylorhynchus
cast of skull and jaw
Permian
mammal-like reptile
Cretirhynchia
fossil
Cretaceous
brachiopod
Chronolestes simul
cast of jaw
Tertiary
primate
Cupulocrinus jewetii
fossil
Ordovician
echinoderm
Cyathocrinites
fossil
Mississippian
echinoderm
Cyclolobus
cephalopod
Permian
invertebrate
Cyclolobus persulcatus
cephalopod
Permian
invertebrate
Cyclotosaurus
cast of skull
Triassic
amphibian
Cylindroteuthis
fossil
Jurassic
cephalopod
Cynognathus crateronotus
cast of skull and jaw
Triassic
mammal-like reptile
Dactylocrinus
fossil
Devonian
echinoderm
Dakotacancer
fossil
Cretaceous
arthropod
Daraelites
fossil
Permian
cephalopod
Daraelites elegans
fossil
Permian
cephalopod
Deer Antlers
fossil
Tertiary
mammal
Deinosuchus rugosus
cast of jaw and skull
Cretaceous
reptile
Deinonychus antirrhopus
skull recreation
Cretaceous
dinosaur
Deltablastus batheri
fossil
Permian
echinoderm
Deltablastus jonderi
fossil
Permian
echinoderm
Deltavjatia vjatkensis
cast of skull
Permian
reptile
Dendrepeton
cast of skull
Pennsylvanian
amphibian
Designathus
cast of jaw
Pennsylvanian
amphibian
Desmoceras
fossil
Cretaceous
cephalopod
Desmoceras
fossil
Cretaceous
cephalopod
Desmatosuchus spuriensis
cast of skull
Triassic
reptile
Diadectes
cast of skull
Permian
amphibian
Diademodon
cast of skull
Triassic
mammal-like reptile
Dickinsonia costata
fossil
Precambrian
segmented worm
Dickinsonia elongata
cast
Precambrian
segmented worm
Dicynodon
cast of skull
Permian
mammal-like reptile
Dicynodon
cast of skull and jaw
Permian
mammal-like reptile
Didelphidon
cast of jaw and skull
Cretaceous
mammal
Dieneroceras
fossil
Triassic
cephalopod
Dikecephalina
fossil
Ordovician
arthropod
Dilong paradoxus
sculpture of skull
Cretaceous
dinosaur
Dimetrodon grandis (juvenile)
cast of skeleton
Permian
mammal-like reptile
Dimetrodon limbatus
cast of skull and jaw
Permian
mammal-like reptile
Diplodocus longus
cast of skull and jaw
Jurassic
reptile
Dipterus valenciennesi
photo
Devonian
fish
Discocyclina
fossil
Tertiary
eukaryote
Discocylmenia
fossil
Devonian
cephalopod
Discoscaphites
fossil
Cretaceous
cephalopod
Ditimopyge
fossil
Permian
arthropod
Dolichorynchops osborni
sculpture of skull and jaw
Cretaceous
reptile
Domataceras
fossil
Pennsylvanian
cephalopod
Dombarites carinatus
fossil
Mississippian
cephalopod
Dombarites liratus
fossil
Mississippian
cephalopod
Dryopithecus
cast of left mandible
Tertiary
primate
Dunkleosteus terrelli
cast of jaw
Devonian
fish