The virus is injected into fertilized chicken eggs, where it multiplies and is then harvested to create the vaccine. Paint: Egg yolks can be used as a binder in paint.

Though it's rare to find fertilized eggs in the U.S., you might still be wondering how to tell if you've bought some -- and whether you can eat them.

I always have fried eggs for breakfast. Every once in a while I run across a double-yolk egg. If a chicken laid a fertile double-yolk egg and it hatched, would there be twin chicks or even Siamese ...

But while a darker egg yolk does not mean a chicken is eating a nutritious, organic or fresh diet, "it likely will correlate, since the foods with the pigment are also packed with other nutrients ...

Researchers from King’s College London (KCL) suggest that fertilized chicken eggs could provide a low-cost option for cancer imaging studies, potentially helping to resolve some ethical and economic ...