What Is Menkes? Twins Fight to Survive Rare Disease

Teen Allergic to 'Almost Everything' Gets Service Dog That Saves Her Life

A Goth Duck With Slicked Feathers and Piercing Eyes Is Swimming in Sewage

Global Search to Find Donor With Rare Blood Type for Toddler With Cancer

Surfer Dies From Brain-Eating Amoeba After Visiting Wave Pool

Little Boy Has Rare Condition That Makes Him Allergic to Sunlight

Tiger and Bear Battle it Out Over Territory in Intense Video

Group Finds Extremely Rare White Stag