Francium was discovered by Marguerite Perey in 1939 when she was researching the radioactive decay of actinium-227. The discovery took place at the Curie Institute in Paris. The element takes its name from the country of its discovery â France.
Worldâs Biggest Dog, Worldâs Heaviest Dog. Hercules: The Worldâs Biggest Dog Ever According to Guinness World Records. Hercules was recently awarded the honorable distinction of Worlds Biggest Dog by Guinness World Records. Hercules is an English Mastiff and whas a 38 inch neck and weighs 282 pounds.
Belgian Mastiff â The Belgian Mastiff is a strong dog with a short coat that can be brown-brindle, black, fawn or red in color. This breed stands between 27 and 32 inches tall and weighs between 99 to 110 lbs. Some question whether or not this breed is currently extinct.