Matthew Brown    Accounts of Leif Erikson’s voyage to present-day Canada were known to Europeans in Christopher Columbus’s time.

Liam Scott    Three Northern Virginia high school seniors decided that because most map programs are for drivers, they would make one for pedestrians.

Liam Scott    The mother of Talib Shakir, who was director of the mayor’s office of returning citizen affairs, said he was determined to make something out of his...