Sharks were first found to have existed in the Ordovician Period which was 450-420 million years ago. Sand sharks are also known as nurse sharks.
Not sure what era but fossils of cats were found that dated back to the Eocene period. Cats came around in the 19th century.
No, dinosaurs did not appear until the Mesozoic Era, which followed the Paleozoic Era. Dinosaurs first appeared around 230 million years ago at the start of the Triassic period. The Paleozoic Era ended around 252 million years ago.
Yes. Sharks have been around for more than 400 million years.
Crocodiles first appeared around 200 million years ago during the Mesozoic Era. They are ancient creatures that have remained relatively unchanged over millions of years.
No, the Paleozoic era is the first of three eras in the Phanerozoic eon. It spans from around 541 million years ago to 252 million years ago. The following era is the Mesozoic era, which is the second era in the Phanerozoic eon.
probably mesozoic era
Vertebrates first appeared during the Paleozoic era.
the cenozoic era
Pre-Cambrian. It's when bacteria first came about.
Actually they were from the Pennsylvanian Period and the Paleozoic Era...
Silurian
The Cenozoic era at about 65 million years ago. The Paleogene period.
9500 BC. When the switch between the Paleolithic Era to the Neolithic Era began.
Reptiles first appeared during the Paleozoic Era, specifically the Carboniferous System of the Paleozoic Era. That was about 320 million years ago.
No, but sharks were there at the time of dinosaurs but at the end of the Mesozoic Era. Eras: Cenozoic Era ( Present-day) Mesozoic Era (dinosaur time) Paleozoic Era (blast of organisms (more complex)) Precambrian Era (4.6 billion years ago, simple organisms form)
before time even started when mesopotamians were alive.
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.