I WONDER - Do All Mammals Have Hair? Me Pregunto - Todos Los Mamíferos Tienen Pelo?

The video explains that most mammals give birth to live young and provide parental care, such as feeding milk. It highlights the kangaroo as an example of extended parental care. However, there are exceptions like the platypus and spiny anteater, which lay eggs instead of giving birth to live young.

What new insight or understanding did you gain from this video?