How do you know that people’s brains are getting smarter? Do they look more developed after?

Question: How do you know that people's brains are getting smarter? Do they look more developed after?
- Keywords:
  brain,
  human body
Asked by 875nenp52 to Sonia on 8 Nov 2018.
- Sonia Lenehan answered on 8 Nov 2018:
  
  Yes! They are getting are getting slightly bigger over time and certain parts of the brain are looking more developed This is a great article that briefly explains how we know our brain is bigger now then it was a million years ago what parts of the brain are changing shape! https://www.scientificamerican.com/article/how-has-human-brain-evolved/

Question: How do you know that people's brains are getting smarter? Do they look more developed after?