An Idaho company has released a glow-in-the-dark petunia called Firefly Petunia. By day, the plant looks like an ordinary white-flowered bedding plant. After the sun goes down, the plant reveals its superpower by emitting a faint green glow. While the glow is noticeable, it isn’t bright enough to keep your neighbors awake at night.Light Bio, Inc., a biotechnology company based in Ketch...