The Cambrian Explosion, around 542 million years ago.
The Archean.
The earliest era is the Cryptic era (an informal designation) for the earliest part of the Hadean eon which is not technically seperated into era. The first formal era is the Eoarchaean.
The Mesozoic Era.
The Mesozoic Era.
The Colonial Era started with the first European Colonists to the Americas. Before that time there was very little contact between Europe and the Americas. The American continents were occupied by the Native American population.
It is the era which occurred about 550 million years ago when animal life exploded onto the scene, here on planet Earth.
The Big Bang theory suggests that the universe began as an extremely hot and dense state around 13.8 billion years ago. Over time, matter and energy expanded and cooled, eventually giving rise to the formation of galaxies, stars, and eventually planets where life could potentially emerge.
The first era in geologic time is the Precambrian era, spanning from about 4.6 billion years ago to 541 million years ago. It is characterized by the formation of the Earth, the origin of life, and the development of early single-celled organisms. This era laid the foundation for the subsequent evolution of more complex life forms.
The Precambrian Era was the first emergence of complex, multicellular life forms on earth. Jellyfish and segmented worms were discovered to have lived during this time.
The Archean.
The Paleozoic Era, because rich fossil evidence displays that early life in the time of the Paleozoic Era, there existed a dicersity of marine life.
The earliest era is the Cryptic era (an informal designation) for the earliest part of the Hadean eon which is not technically seperated into era. The first formal era is the Eoarchaean.
Pre-Cambrian. It's when bacteria first came about.
the trees first was there
There are so many facts about the Paleozoic era. This was the time when the explosion of different forms of life. New species of organisms were formed during this era which started over 500 million years ago.
During the Precambrian era, living organisms such as simple bacteria and algae were the primary life forms. These organisms lived in the oceans and played a crucial role in shaping the early Earth's environment. The Precambrian era is also when the first eukaryotic cells evolved, marking a significant milestone in the history of life on Earth.
Life first flourished on Earth during the Precambrian era, which began around 4.6 billion years ago and lasted until approximately 541 million years ago. This era saw the emergence of diverse forms of single-celled organisms, marking the beginning of life's evolution on our planet.