It feels that it is getting slightly larger, but no dramatic breakthroughs.
Interesting link on the importance of Peekaboo
Another below on horses
The horses tended to look at the angry faces out of their left eye—a response well-documented in horses and in dogs, indicating that an animal is engaging the right hemisphere of its brain where novel and fear-provoking stimuli are processed. The horses’ heart rates also rose more quickly when they were presented with the angry face. Being able to tell a smiling handler from an angry one is a useful skill for a domestic horse—being approached by a frown rarely results in happy consequences.