How old is the Earth?
Q: How old is the Earth?
A: The Earth is about 4.56 billion years old.
Q: What has helped us understand the Earth's past?
A: Nearly all branches of science have helped us understand the Earth's past.
Q: What is the geological time scale?
A: The geological time scale shows the large span of time from the beginning of the Earth to the present.
Q: What is the age of the universe compared to the age of the Earth?
A: The Earth is about one-third the age of the universe.
Q: How did the Earth form?
A: The Earth formed as part of the birth of the Solar System, which started as a large, rotating cloud of dust and gas.
Q: What was the Sun composed of when the Solar System formed?
A: The Sun was composed of hydrogen and some helium when the Solar System formed.
Q: When was the earliest undisputed evidence of life on Earth found?
A: The earliest undisputed evidence of life on Earth dates back at least 3.5 billion years ago during the Eoarchean era.
