Question

The Big Bang is estimated to have occurred approximately:

Options

• 500 million years ago

• 93 billion years ago

• 13.7–15 billion years ago

• 4.5 billion years ago

Answer 1

The universe began with the huge explosion known as the Big Bang approximately 13.7–15 billion years ago. This predates the formation of Earth, which occurred about 4.5 billion years ago.