horses foxes and all other mammals have backbones. Also, birds and fish also have backbones.
The first known to man animal with a back bone has been discovered as the Muck, as the name known to man now.
Pre-Cambrian. It's when bacteria first came about.
Pre-Cambrian. It's when bacteria first came about.
400 million years ago
Mammals first appear in the fossil record of the Mesozoic Era.
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.
Silurian
before time even started when mesopotamians were alive.
the paleozoic era
Mesozoic
Mesozoic
Vertebrates first appeared during the Paleozoic era.
probably mesozoic era
the cenozoic era
Early man first appeared in the Cenozoic Era, specifically during the Quaternary Period. This era began around 2.6 million years ago and continues to the present day.
Homo sapiens first appeared during the Upper Paleolithic period, approximately 300,000 to 200,000 years ago. This era is characterized by the emergence of fully modern humans with advanced cognitive abilities, artistic expressions, and more sophisticated tool-making techniques.
Pre-Cambrian. It's when bacteria first came about.
Pre-Cambrian. It's when bacteria first came about.