I can't see anything with this blindfold. Sorry, you've got the wrong person. I know your voice anywhere, Ed. And this is Ed for Kids Earth and Sky. Scientists think that these marine mammals can recognize each other by their calls.
Babies probably learn their mothers' calls, while still inside the womb.
Baby dolphins and whales usually stick pretty close to their moms for the first three or four months of life. Later on, they can swim far away from their mothers and go dive and play. Thanks for your question, Hannah. Our show is made possible by the National Science Foundation.