1) The assassination of Archduke Franz Ferdinand of Austria in 1914 triggered the start of World War I.

2) Chocolate chip cookies, a beloved sweet treat, were invented by Ruth Graves Wakefield in the 1930s. Wakefield ran the Toll House Inn in Massachusetts and added chopped chocolate to her cookie dough, expecting it to melt and create an all-chocolate cookie. Instead, the chocolate bits retained their shape, giving birth to the classic chocolate chip cookie. Today, they are a staple in cookie jars, dessert menus, and homemade baking, enjoyed by people of all ages.

3) Orchids are one of the largest families of flowering plants, with over 25,000 species.

4) The first computer mouse was invented by Douglas Engelbart in 1964 and consisted of a wooden shell and two metal wheels.