Tales and Trails: The color of magpies

Some of the hardest questions to answer start with why.

Why will fish bite one day and not the next, or even stop biting when they were having a feeding frenzy a minute ago?

Why did prehistoric people use a particular cliff face to draw a petroglyph?

Why can I not win the lottery? Okay, scratch that.

Just the other day, an acquaintance asked why magpies are black and white.

First, magpies are not...