"Hold on to your Viking helmets as you learn about the first known European to set foot on North America in this exciting addition to the Who Was? Series! Leif Erikson was born to be an explorer. His father, Erik the Red, had established the first European settlement in present-day Greenland, and although he didn't yet know it, Leif was destined to embark on an adventure of his own. The wise and striking Viking landed in the area known as Vinland...

"In 1914, the assassination of an Austrian archduke set off a disastrous four-year-long conflict involving dozens of countries with battles taking place in all parts of the world. World War I was the first to use planes and tanks as well as deadly gases that left soldiers blinded or "shell shocked" (a condition now called Post Traumatic Stress Syndrome). There were battles that lasted for months with opposing troops fighting from rat-infested trenches,...