How do humans change during their lifetime? Find out about the different stages of a human life cycle and how we change as we grow up. Find out how the skeleton helps us move and protects some of our ...

Narrator: This is Edna Bumcrank. She’s rather old. But of course she hasn’t always been like this. I wouldn’t do that if I was you burglar because… When she was younger, Edna used to be a ninja. Let’s ...

A body temperature below 95 degrees F can mean hypothermia, which needs urgent medical care. Older people often have lower body temperatures due to fat loss and dry skin. Medicines like opioids and ...