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.
An English mastiff named Kell, described as weighing. taller than a Shetland pony, and more than six feet long, was previously described as the world's heaviest dog, but it's unclear whether she's still alive. (Different newspaper articles from 2001 refer to her as both living and dead, and we could find nothing but brief, indefinite mentions of her after early 2002.