One day in history about 4.5 billion years ago was a dramatic one for Earth, potentially giving our planet an instant moon and an almighty headache all in one go.

How each outlet headlined it

• Space.com

  One day in history about 4.5 billion years ago was a dramatic one for Earth, potentially giving our planet an instant moon and an almighty headache all in one go.
  
• Space

  Earth's moon could have formed in just 5 hours after giant impact