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 Neopolitan Mastiff is a large guardian breed native to Italy. Romans once used this breed as war dogs. The height of this giant breed ranges from 26 inches to 30 inches and have a weight of 54.4-90.4 kg. The massive Neopolitan Mastiff dogs have loose skin and thick wrinkled face. They have a wide flat head and large nose.