What event sparked leifs interest in exploring a new land?

Leif Eriksson's interest in exploring a new land was sparked when he heard about the discovery of a new region to the west of Greenland by Bjarni Herjolfsson. This news intrigued Leif and led him to organize an expedition to find this new land, resulting in his discovery of Vinland (believed to be present-day Newfoundland in Canada).