what is the highest mountain on earth ?

Question: what is the highest mountain on earth ?
- Keywords:
  earth,
  highest,
  mountain
Asked by to David on 19 Jun 2014. This question was also asked by .
- David Davila answered on 19 Jun 2014:
  
  Mount Everest, at a whopping 8,848 metres over sea level!
  
  The second highest is a mountain called K2, which is 8,611 m, but much harder to climb than Everest, actually!

Question: what is the highest mountain on earth ?