1899 lithograph of white minstrel performer Carroll Johnson depicted in blackface, right.
Library of Congress
The public was shocked by the blackface image on Virginia Gov. Ralph Northam's yearbook page. But if blackface is now taboo, there was a time when it played a big role in American culture.
Mexican president Andrés Manuel López Obrador with the families of the 43 students who went missing in 2014 in Guerrero state. He has ordered a truth commission to investigate the unsolved disappearance.
President López Obrador campaigned on some outside-the-box ideas to 'pacify' Mexico after 12 years of extreme violence. But so far his government has emphasized traditional law-and-order policies.
America’s public schools were meant to bring together children from all walks of life.
Monkey Business Images/www.shutterstock.com
Public schools were originally envisioned in the 19th century as 'common schools' where rich and poor kids could be educated together. MLK wanted the same thing – but it's not happening.
An escalator with a pile of plastic bottles at the factory for processing and recycling.
With all those blue recycling bins around you might think we are experts at recycling plastics. The truth is, that though many plastic items can be recycled, very few are. So what's the solution?
Do you know what have your clothes been soaking in?
Dry cleaning isn't really dry – it uses chemical solvents. Perc, the most common option, has contaminated soil and groundwater and poses serious health risks, but safer choices are emerging.
President George H.W. Bush in 1990.
Though his education initiative staggered while he was in office, the late former President George H.W. Bush had an influence that continues to shape education policy, an education historian says.
Vaccine work because they help create herd immunity.
Billboards spreading misinformation on the risks of vaccination have popped up around American cities. A bioethicist explains why decisions not to vaccinate children are indefensible.
A memorial vigil for the victims of the shooting at the Tree of Life Synagogue where a shooter killed 11 and wounded six on Oct. 27, 2018.
AP Photo/Gene J. Puskar
The attack at a synagogue in Pittsburgh and the sending of pipe bombs to critics of the current administration are examples of the increase in the violence on the margins of the right.
That year, the pillars of 1960s pop music released unfocused, confused albums.
A few musicians metaphorically took to the streets. But most fled for cover.
High school students at the University of Maine Farmington’s Upward Bound program playing the World Climate simulation.
In the 'World Climate' simulation, people play delegates to UN climate negotiations and work to strike an agreement that meets global climate goals. Playing it has made thousands want to take action.
Anita Hill, who accused U.S. Supreme Court nominee Clarence Thomas of sexual harassment, amid heavy security when she was to testify before the Senate Judiciary Committee, Oct. 10, 1991.
AP Photo/Doug Mills
Anita Hill charged in 1991 that Supreme Court nominee Clarence Thomas sexually harassed her. He was still confirmed. Now, another nominee faces sexual assault allegations. Have times changed?
More than 6 million US citizens can't vote because they've been convicted of a felony. But states are beginning to change their laws. Will it make a difference?
Ford has doubled down on its best-selling pickup trucks.
AP Photo/Paul Sancya
For 30 years, it’s been the best-selling vehicle in the US.
Top-down artist depiction of a tiny black hole and a pileup of gas and matter swirling toward the center.
The little-known Rossi X-ray Timing Explorer spacecraft was like a Geiger counter for the universe, listening to black holes and zombie stars.
Rwanda’s Genocide Memorial burial site.
As Rwanda marks the 24th anniversary of the 1994 genocide, much more needs to be done to unite the country.
How do survivors find healing? Chum Mey, a survivor of the Khmer Rouge regime, walks past a portrait of Nuon Chea, a former Khmer Rouge leader.
AP Photo/Heng Sinith
The accounts of survivors of Pol Pot's Khmer Rouge show how they were able to find justice and healing by breaking their silence and speaking on behalf of those who were killed.
Evidence from countries that execute people for drug offenses shows no relationship between harsh punishment and rates of drug use.
Just seven countries worldwide regularly execute people for drug crimes, most of them authoritarian regimes. Nothing suggests that this brutal policy actually curbs drug use.
Is it going to stop?
In the wake of a self-driving Uber car killing a pedestrian in Arizona, an ethicist examines the state of autonomous vehicle development.
Plutôt que d'observer étoiles ou bactéries sur leurs écrans, les chercheurs pourraient utiliser Twitter pour communiquer et chercher des financements.
Beaucoup de scientifiques sont réfractaires à l'utilisation des réseaux sociaux. Pourtant, Twitter peut s'avérer être un excellent moyen de communiquer et même de trouver des financements.
Gates of the Arctic National Park, Alaska. Plants on the Arctic tundra absorb mercury from the air, then transfer it to soil when they die.
How do mercury emissions from industrialized countries reach the remote Arctic? Recent research shows that plants on the tundra absorb mercury vapor through their leaves, then pass it into soil.