Megaraptorids are known for somewhat small but sharp teeth, air-filled bones, and powerful forelimbs with enormous claws. These dinosaurs have mostly been found in southern continents.

About 120 million years ago, Victoria, Australia, was a land of endless winter. The southern coast was a frigid river valley, its banks lined with pine trees and its waters teeming with fish. Dinosaurs roamed this icy world,

Between 122 and 108 million years ago, the Australian landmass was much farther south than today. Victoria was positioned within the Antarctic Circle, separated from Tasmania by a vast rift valley rather than open sea.