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How old was the earth when the first mammals appeared how long ago was this?
The first true mammals appeared in the early Jurassic, about 200-180 million years ago. The Earth is approximately 4.54 million years old today, so it would have been about 4.34-4.36 billion years old at that point.
How old was earth when life appeared on it?
The Earth is about 4.5 billion years old. Life appeared on Earth about 3.5 billion years ago. The Earth would have been about 1 billion years old at that time.
How old was Selena Gomez when she first appeared on tv?
Selena Gomez was 7 years old when she first appeared on tv!
How many years ago did the first cell appear?
The first cells appeared about 3 billion years ago. This is based on fossel records (the earth is about 4.5 billion years old)
How old was Christopher Columbus when he first came to the earth?
He was Born On Earth ! ....
How old was the first women on earth?
Eve
How old was vector?
In the first game ''Chaotix'' in (1995) he was 15 years old when he first appeared.
How old was earth when life first appeared on the planet?
Earth is approximately 4.5 billion years old, and life is believed to have first appeared around 3.5 to 4 billion years ago. This means that life emerged roughly 500 million to 1 billion years after the formation of the planet. The earliest evidence of life comes from microbial fossils and stromatolites found in ancient rock formations.
How old was miley when she first appeared on tv?
1 years old
When did invertebrates first appear on the Earth?
Invertebrates first appeared on Earth over 550 million years ago during the Ediacaran period. These early invertebrates were simple organisms without backbones and laid the foundation for the diverse array of invertebrate species that exist today.
How old was John Glenn on his first trip to space?
He was 41 years old when he first orbited earth.
Did the first cells appear ten billion years ago?
No. Earth itself is "only" about 4.6 billion years old. The first life may have emerged about 4 billion years ago.
