Every 238 years, the orbits of Neptune and Pluto change making Neptune at times the farthest planet from the sun.

Zookeepers in Calcutta, India, were caught drugging rhinos to make them urinate more. They sold the urine as an ingredient in medicine.

Plutonium - first weighed on August 20th, 1942, by University of Chicago scientists Glenn Seaborg and his colleagues - was the first man-made element.

AMAZING FACTS