eutherian mammals and precocial birds · All Facts

eutherian mammals and precocial birds
Bone histology shows dinosaurs grew at accelerated rates versus living reptiles — large species reached rates comparable to eutherian mammals and precocial birds.
SrcErickson et al., Nature (2001)

Next evidence →22 metresBrachiosaurus had front legs longer than its hind legs — giving a giraffe-like upward tilt for browsing tall trees; NHM lists it at about 22 metres long.

More packs

Dino
Body
Weird
Animals
Snakes
Insects
Ocean
Hidden Gems
Space
Mummies

More in Dino

permineralization and mineral replacementMost dinosaur “bones” on display are fossils formed by permineralization and mineral replacement — original bone pores and tissue swapped or infilled by silica and other minerals.
22 metresBrachiosaurus had front legs longer than its hind legs — giving a giraffe-like upward tilt for browsing tall trees; NHM lists it at about 22 metres long.
chestnut to reddish-brownFossilized melanosomes in Jehol theropods show Sinosauropteryx's dark tail stripes were likely chestnut to reddish-brown — not unknown color forever.
0.7 metersCompsognathus is listed by the Natural History Museum at only about 0.7 meters long — one of the smallest known dinosaurs.

Open full Dino pack →

← Back to evidence