Vaporizer pens look like the e-cigarettes that dispense nicotine. But these devices are optimized for a potent marijuana resin with high concentrations of THC. Courtesy of Grenco Science hide caption

itoggle caption Courtesy of Grenco Science

Xanax and Valium, prescribed to treat anxiety, mood disorders and insomnia, can be deadly when mixed with other sedatives. Dean812/Flickr hide caption

itoggle caption Dean812/Flickr

Volunteers with lower levels of blood sugar stuck more pins in voodoo dolls of their spouses than people with higher levels. Courtesy of Brad Bushman hide caption

itoggle caption Courtesy of Brad Bushman