Use of metformin is not associated with insomnia. In addition, a long-term study of people with Type 2 diabetes treated soon after diagnosis with metformin showed a lowered risk of death, heart attack, and vascular problems; whether these benefits extend to everyone who takes it is not known. 5. TRUE.
Afro-Eurasia is the largest land mass on Earth. It is the combine super continent of Asia, Africa, and Europe.
  Of course, there are some other quite large land masses above sea level, as well, such as Greenland, Iceland, New Guinea, Madagascar, etc    However, by name, the largest single land mass is called, Asia.