Wikipedia, like my breakfast eggs, is sometimes a bit scrambled. Bjarni saw America but didn't bother to land there. Leif went back years later and established a colony of sorts. Among life's greater mysteries, how Bjarni knew he wasn't at Greenland (since he never saw that place either) and how he got back to Greenland without a map. And why his family didn't kick him out of their house after two weeks....

But I must have been in the cloak room during reading lessons. I didn't learn all this until many years later.