T.rex: King of the Lizards

The female Tyrannosaurus rex must move her tail to the side for sex, according to new paleobiological findings highlighted in The Discovery Channel show "Tyrannosaurus Sex." (Locomotive Group)

Like most animals today, the male Tyrannosaur would have mounted the female from behind. (Locomotive Group)

As with Tyrannosaurus, paleobiologists are learning more and more about other dinosaurs. For example, contrary to some outdated theories, the female titanosaur could easily support the weight of the male during sex. (Locomotive Group)

Titanosaurs such as these likely had a dance-like mating ritual prior to sex. (Locomotive Group)

During the stegosaurus mating ritual, the profile position best showcased the creature's plates. (Locomotive Group)

The male Tyrannosaurus rex unleashing a mighty roar--the mating cry of the "tyrant lizard"? (Locomotive Group)

The female T.rex takes a vulnerable position prior to sex, to let the male know she's "very interested." (Locomotive Group)

There have been mighty steps forward in computational power and computer-rendering ability recently. The Discovery Channel's artists used these advances in graphics to depict dinosaurs as never before, letting viewers see deep inside the body of a dinosaur. (Discovery Channel)

Skeletal restoration by William D. Matthew from 1905, the first reconstruction of this dinosaur ever published. (American Museum of Natural History)

The Field Museum of Natural History, in Chicago Illinois, has this "Sue" specimen.  (Field Museum of Natural History)

Tyrannosaurus rex stalks his hapless victims in the movie, "Land of the Lost."  (Universal Pictures)

The Discovery Channel Brings Dinosaurs Roaring to Life. (Discovery Channel)

Tyrannosaurus Rex in Scene From TV Series "Land Of The Lost." (AP)

A Spectacular Tyrannosaurus Rex Skeleton in the Royal Tyrrell Museum of Palaeontology in Alberta. (Royal Tyrrell Museum)

Outdated reconstruction (by Charles R. Knight), showing 'tripod' pose. (National Geographic)

A Tyrannosaurus rex skeleton on display at the Burpee Museum of Natural History in Rockford, Ill. (AP)

Complete Tyrannosaurus Rex Skull (American Museum of Natural History)

Cast of a Specimen Nicknamed "Stan" (specimen BHI 3033), at Manchester Museum (Wikipedia)

Restoration (Based on MOR 980) with Parasite Infections, Which Might be the Cause of Scars Seen in the Skulls of Several Specimens that were Previously Explained by Intraspecific Attacks. (Wikipedia)

"Jane" Specimen, Burpee Museum, Rockford, Illinois. (This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license. )