After suffering through years of suppression under Nigeria’s military government, the breakaway state of Biafra proclaims its independence from Nigeria. In 1960, Nigeria gained independence from Britain. Six years later, the Muslim Hausas in northern Nigeria began massacring the Christian Igbos in ...

The U.S. unmanned space probe Mariner 9 is launched on a mission to gather scientific information on Mars, the fourth planet from the sun. The 1,116-pound spacecraft entered the planet’s orbit on November 13, 1971, and circled Mars twice each day for almost a year, photographing the surface and ...