The first dinosaurs lived in the beginning of the Mesozoic Era (or the Age of Reptiles). Birds were amazingly discovered to be dinosaurs so dinosaurs were also alive in the Cenozoic (that's our time-the Age of Mammals) to today.
Pre-Cambrian. It's when bacteria first came about.
Yes, the Cambrian Period was before the Mesozoic Era
The earliest known dinosaur Eoraptor dates back to 230 years ago. An recent fossil find in Madagascar however suggest that a species of pro-saurapod may have predated this by 2 or 3 million years at 233 years ago.
Mammals first appear in the fossil record of the Mesozoic Era.
The first dinosaur footprints were found in the Late Triassic Period, around 231 million years ago. The fossil discovered on Vega Island in 2009 likely belonged to a Late Cretaceous dinosaur, dating back to around 66 million years ago.
The first stage in dinosaur times (the Mesozoic Era) was the Triassic.
Dinosaurs first appeared around 230 million years ago, during the Triassic period. This was part of the Mesozoic era, which covered almost all of dinosaur existence.
In the Mesozoic era
That depends on what you mean. The first Dinosaur discovered by scientists and named was Megalosaurus. But many believe that ancient civilizations based myths of dragons, griffens, sea serpents, Gods, etc, on Dinosaur fossils. The first Dinosaur to appear, as in the oldest Dinosaur, was Herrarasaurus. But older Dinosaur fossils may be found, so we can never be certain.
Some kind of a mating signal during the dinosaur era.
probably mesozoic era
Vertebrates first appeared during the Paleozoic era.
the cenozoic era
No. Sharks appeared on earth long before the first dinosaurs did.
they were first noticed millions of years ago during the dinosaur time
The dinosaurs were around millions of years ago.The iceage came after.
Pre-Cambrian. It's when bacteria first came about.