Approximately How Old is Life on Earth

Question

Approximately how old is life on Earth?
A) 36 billion years old
B) 3.6 billion years old
C) 360 million years old
D) 36 million years old

Accepted Answer

The oldest known fossils are about 3.5 billion years old, and scientific studies suggest that life on Earth may have developed as early as 4.1 billion years ago. Therefore, choice B is the correct answer. Choice A is too large a number, and choices C and D are far too recent for the age of life on Earth.