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.
The American Kennel Club states the largest dog is the English Mastiff (aka: Old English Mastiff.) They are the heaviest of the dog breeds, but the Irish Wolfhound was recorded at 5 feet at it's shoulders. Guiness Book of Records states that the dog that is the longest and heaviest in an English Mastiff named 'Zorba.'