Children (Chapter)

 is the 47th chapter of Shingeki no Kyojin.

Short Summary
Many things are revealed about human-titans or "Titan Shifters" in this chapter:

-They don't age: Ymir looks like a young adult, yet she mentioned to Reiner and Berthold that she had wandered outside the walls for 60 years before entering the city inside the walls, meaning that she might be centuries old;

-They can't always turn back into their human form as they please.