Mesozoic era
The main characteristic that distinguishes the fossil record of the Paleozoic Era from the Precambrian Era is the appearance of diverse and complex multicellular organisms in the Paleozoic Era. In the Precambrian Era, the fossil record primarily consists of simpler single-celled organisms. Additionally, the Cambrian Explosion, which occurred at the beginning of the Paleozoic Era, marked a significant increase in the diversity of life forms.
The fossil record suggests that the earliest known bird capable of powered flight was Archaeopteryx, which lived around 150 million years ago during the late Jurassic period. This indicates that birds began to fly during the Mesozoic Era.
The Paleozoic era began about 543 million years ago. It came after the Precambrian era and before the Mesozoic era.
Abundant and diverse fossils first appeared in the Cambrian era, although there is fossil evidence throughout much of the Precambrian.
The answer is the fossil record :D
paleozoic
Humans evolved in the Pleistocene era, which is the most recent part of the larger Cenozoic era. Modern humans first begin appearing in the fossil record approximately 200,000 years ago.
The fossil record organizes fos- sils by their estimated ages and physical similarities.
The fossil record organizes fos- sils by their estimated ages and physical similarities.
The Europeans began to record information about the Native Americans in their journals.
The age of the oldest fossil on record is about 3.5 billion years old.
Cenozoic Era