English

Before the Little Rock Nine, before Rosa Parks, before Martin Luther King Jr. and his March on Washington, there was Barbara Rose Johns, a teenager who used nonviolent civil disobedience to draw attention to her cause. In 1951, witnessing the unfair conditions in her racially segregated high school, Barbara Johns led a walkout—the first public protest of its kind demanding racial equality in the U.S.—jumpstarting the American civil rights movement.

In 2008, Professor Lee Berger--with the help of his curious 9-year-old son--discovered two remarkably well preserved, two-million-year-old fossils of an adult female and young male, known as Australopithecus sediba; a previously unknown species of ape-like creatures that may have been a direct ancestor of modern humans. This discovery of has been hailed as one of the most important archaeological discoveries in history. The fossils reveal what may be one of humankind's oldest ancestors.

Parvana felt the shadow before she saw it, as the man moved between her and the sun. Turning her head, she saw the dark turban that was the uniform of the Taliban. A rifle was slung across his chest as casually as her father's shoulder bag had been slung across hers...

The Talib kept looking down at her. Then he put his hand inside his vest. Keeping his eyes on Parvana, he drew something out of his vest pocket.

Parvana was about to squish her eyes shut and wait to be shot when she saw that the Talib had taken out a letter.

He sat down beside her on the blanket.

It's 1793, and there's an invisible killer roaming the streets of Philadelphia. The city's residents are fleeing in fear. This killer has a name—yellow fever—but everything else about it is a mystery. Its cause is unknown, and there is no cure.

In 1964, Mississippi civil rights groups banded together to fight Jim Crow laws in a state where only 6.4 percent of eligible black voters were registered. Testing a bold new strategy, they recruited students from across the United States. That summer these young volunteers defied segregation by living with local black hosts, opening Freedom Schools to educate disenfranchised adults and their children, and canvassing door-to-door to register voters.