Fontanelle

When a small baby is not moving, it's worth having a look at his/her fontanelle. A few weeks ago...

W: If you look carefully, you can see where the bones of his head haven't come together yet.
Me: I've seen. It's why he was a little conehead when he came out.
W: The little pulsating area is amazing.
Me: Eh?
W: You've seen that, yes? 

I look closer. 

Me: Whoa! Why haven't I noticed that before? That's essentially his heart beating!
W: Yup!
Me: Whoa! 

Now, I can't help but notice it.