I can confirm that Luke has reached a milestone: the era of non-gaseous smiles has begun.
Luke is starting to respond to other people to the delight of The Civee and I and (especially) Hope. He’s been giving us a lot of this lately:
For comparison, here’s one of the first pictures of Hope smiling , also at the same age (six weeks and a few days):
We went to the Zoo today, about an hour before closing. It was the first time we’ve ever seen the kangaroos awake and moving, which was entertaining. So if you want to see the kangaroos moving around, eating and getting into kangaroo fights, visit them at the end of the day. Any other time for them is nap time.