which allowed them to grasp and tear branches and leaves from trees

Approximate measurements of the Smilodon:

ischial shaft

hunting alone and not having many natural predators

Fossils and discovery: Fossils of Livyatan melvillei have been found in different places around the world

Archaeopteryx lithographica Scale:1:4 which allowed them to graspArcheopteryx (A. lithographica 'Ancient wing') is an extinct species of primitive bird that lived during the Kimmeridgian period of the Late Jurassic, approximately 150 million years ago, in what is now Germany. It is considered a transitional fossil between dinosaurs and modern birds, and is known for both its reptilian and avian characteristics. Archeopteryx had feathers and wings, but also had reptilian features such as teeth, claws on its wings,