Why Is It?
Cold Animals
How do warm-weather animals survive cold weather zoos? (some adapt, and most are allowed to choose …
Bird Nests
How come birds keep coming back to the same spot to try and build a nest, even though I keep undoing …
Nervous Stomach – rerun #2593
Why does your stomach get upset when you're nervous? (tension in stomach muscle, just like you can …
Fire-Eaters
Why don't fire-eaters burn their mouths? (Saliva absorbs heat, use cool-burning fuel)
Staling
Why do crackers get soggy and bread gets crisp when they go stale? (Gluten absorbs or loses …
Aluminum & Alzheimer’s
Can aluminum cause Alzheimer's disease? (current evidence says no)