The ancestors of dinosaurs walked upright before they evolved into true dinosaurs. The earliest known dinosaur, Eoraptor, walked with upright legs underneath its body.
the first subhuman to walk upright was Homoerectus (Upright Man).
-Dinosaurs have thin/hollow bones, like birds. -Many dinosaurs take care of their young. -Dinosaurs can walk upright (some, at least). -The hip structure of dinosaurs is dissimilar to that of a lizard.
Dinosaurs
Homo erectus
We don't know. Birds do it, some dinosaurs did it.
Homo erectus
Australopithecus africanus
because they were curious about their environment and wanted to see more
Dinosaurs
Humans are bipedal because we walk upright on two legs.
Homo sapiens are modern Humans. most of us walk upright, but some don't.
A tail. Humans can walk upright without it because of the way our spines are curved.