I make a lot of kale chips. You might even say I have chipping kale down to an art. But even for a kale connoisseur like me, the crinkly green cruciferous vegetable is still full of surprises. In this ...

Add Yahoo as a preferred source to see more of our stories on Google. A wooden bowl full of kale. - Janecocoa/Getty Images We all know there are certain materials that don't belong in the microwave.