While viewers' imagination spun a flurry of bizarre tales, the science behind this blood rain lies in a chemical.

Occasionally, the wild fox's sister and their mother would join in to watch the incredible jam session.

Doctor Pepperberg bought Alex from a pet shop in Chicago in 1977. Ever since then, the parrot has enraptured her with its skills.

Nitrous Oxied, a greenhouse gas emitted from cows' body waste, harms the atmosphere and is 25 times more harmful than CO2.