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.
Country of Origin. 1  The Cane Corso Italiano (also known as the Italian Mastiff or Cane Corso Mastiff) is a war and hunting dog which originated in southern Italy. 2  The Cane Corso Italiano has a shoulder height of 64-69 cm (24-27 in) for males and 58-61 cm (23-25 in) for females.