Fluorescence & Phosphorescence
A listener asks: What is the difference between fluorescence and phosphorescence?
Why Is It?
Transitional Fossils
A listener asks: Have many transitional fossils showing evolutionary links between major groups of …
Cat Domestication
A listener asks: where and when were cats first domesticated?
Archaeological Digs
A listener asks: When archaeologists uncover ancient cities, why do they have to dig so deep?
Vitamin C Loss
A listener asks: If vitamin C is essential to our survival, why can't our bodies produce it?
Changing Accents
A listener asks: How far apart do people have to live in order to have different accents?