It was dusk when the first fireball burst from the Mekong. A glowing pink orb hovered over the chocolaty waters for a split second then accelerated noiselessly skyward, winking out some 100 meters above.So begins the Time article Behind the Secret of the Naga's Fire.
I am of course talking about Naga Fireballs, a not-fully-explained phenomena that happens every year around October. In fact, here's a video from ONE YEAR AGO TODAY! Show/Hide
So what causes the mysterious lights? ^_^ I wouldn't dream of spoiling it for you.