What makes us “human”, and will we ever find out?

Question: What makes us "human", and will we ever find out?
- Keywords:
  human body
Asked by Shinx-985 to Sudhin, Katie, Frances, Diarmuid, Aoife on 12 Nov 2019.
- Katie Fala answered on 12 Nov 2019:
  
  I’m not sure, in my opinion our ‘human-ness’ comes from our brains and ability to exhibit traits like empathy for others, which don’t directly benefit our own survival.

Question: What makes us "human", and will we ever find out?