1. When you Google a business, and it shows a bar graph of the business's busiest hours... HOW DOES IT KNOW?
    Cash register records? All of our collective cell phone GPS's?
  2. How does Spotify work?
    Do you get to KEEP the music somehow?
  3. The other day I was discussing someone with a friend, and he showed up the next time I went on FB as Someone You May Know.
    Hadn't Googled him or anything. Am thoroughly creeped out.
  4. How does the maps app know where accidents are?
  5. How can my iPhone tell my "stairclimbing activity"?
    Does it have an altimeter?!
  6. How does Bluetooth work? And Airdrop?