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 Guinness world record for biggest (heaviest) dog was set in 1989 by an Old English Mastiff named Aicama Zorba of La-Susa, owned by Chris Eraclides of London, England. Zorba weighed in at 343 pounds. The biggest dog alive is said to be a female English Mastiff named Kell, who weighed 286 pounds in 1999.