Seeing that your steak has taken on a greenish hue isn't necessarily a red flag. It could be the result of oxygen exposure rather than spoilage.

Polar bears aren't actually white.Turns out, they can come in all sorts of colors: yellow, gray, orange, and even green. That's because polar bear fur is transparent and hollow.When light strikes ...

Experience the iconic tradition of the Chicago River turning green for St. Patrick’s Day—watch the transformation in this ...

She told me that snot is normally clear. It turns yellow or green when our bodies fight germs that can make us sick. Snot is also called mucus. It’s a thin, slippery liquid that covers many of ...