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.
Males over 200 pounds are not too uncommon and a few females reach these weights. According to the Guinness Book of Records the record holder for the world's largest dog is Zorba, a Mastiff, at 343 pounds. He stood 37 inches at the shoulder and was 8 foot 3 inches from the tip of his nose to the tip of his tail.