is there any proven evidence that something or somewhere there could be something that could cause the human race to be – Secondary 11

Question: is there any proven evidence that something or somewhere there could be something that could cause the human race to be extinct?
- Keywords:
  extinction,
  future
Asked by ciaraistall to Amylou, Maria, Mark L, Mark U on 2 Jul 2012.
- Mark Uphill answered on 2 Jul 2012:
  
  Hi ciaraistall, if there was evidence, I’d like to think that “those in the know” were taking some steps to do something about it!

Question: is there any proven evidence that something or somewhere there could be something that could cause the human race to be extinct?