Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Trying to find a good video for your little ones to watch on YouTube can be a challenge. Even if you limit the search to YouTube Kids, there’s so much out there. How can you determine what’s good and ...

Imagine a sloth. You probably picture a medium-sized, tree-dwelling creature hanging from a branch. Today's sloths—commonly featured on children's backpacks, stationery and lunch boxes—are slow-moving ...

Teeth first evolved as sensory organs, not for chewing, according to a new analysis of animal fossils. The first tooth-like structures seem to have been sensitive nodules on the skin of early fish ...