How and when allosaurs were replaced by tyrannosaurs and how its lineage arose has been a scientific mystery.
The newly discovered diminutive tyrannosaur lived near the end of the allosaurs and the evolutionary beginnings of the Earth's deadliest tyrant lizards.
Backyard mating battles between male ruby-throated, emerald-skinned chameleons evoke, with a bit of imagination, the earth-shaking set-tos of the 20-foot long, 10-ton allosaurs.
"I went where the bones are soft and the digging is hard." Among his and his volunteers' finds: megalosaurs, allosaurs, and, this summer, what may be one of the earliest Cretaceous ostrich dinosaurs.
And the Jurassic display had brontosaurs and stegosaurs and allosaurs. All just so beautiful.