5 ms·

Curious: how could you pull out the link just now? Did you have it bookmarked somewhere for long time? Or did you see it somewhere recently?

• jlg23 8y ago
  I read something about "double glasses with fluid in between them to simulate the horizon" years ago and then spent some minutes duckduckgoing.
  • akavel 8y ago
    Ah, ok, so just the good, old "brain memory" technology :)