Surprisingly, blood rain turned the sea red at a popular Iranian tourist destination, but there's science behind the blood-red water.

It's often mistaken for blood. But if that were true, most white meat would leak red, too. It's actually a result of freezing the meat during transport. The juice is a mix of water and myoglobin.

But that red liquid isn't blood at all: Rather, it's a mixture of water and a protein called myoglobin. Myoglobin's function is to carry oxygen through the animal's muscle, and it's responsible ...