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1899 lithograph of white minstrel performer Carroll Johnson depicted in blackface, right. Library of Congress

Why blackface?

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.
This is a model of the adenovirus type 5 which causes respiratory infections. Kateryna Kon/Shutterstock.com

Potential treatment for eye cancer using tumor-killing virus

When you think of viruses, you might think of the horrible illnesses they cause, like flu or Ebola. But now researchers are learning how to use the unique traits of viruses to treat disease.
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. Reuters/Edgard Garrido

Mexico is bleeding. Can its new president stop the violence?

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.
An escalator with a pile of plastic bottles at the factory for processing and recycling. Alba_alioth/Shutterstock.com

Toward a circular economy: Tackling the plastics recycling problem

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?
Feel like traveling to another dimension? Better choose your black hole wisely. Vadim Sadovski/Shutterstock.com

Rotating black holes may serve as gentle portals for hyperspace travel

Feel like visiting another star system or dimension? You can do this by traveling through a spacetime portal of a black hole. But you better choose carefully. All black holes are not created equal.
Do you know what have your clothes been soaking in? ET1972/Shutterstock

What is ‘green’ dry cleaning? A toxics expert explains

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.
Dr. Who used the this time machine, called the TARDIS, to travel through space and time on the BBC television show Dr. Who. Babbel1996 / Wikimedia Commons

Time travel is possible – but only if you have an object with infinite mass

Who wouldn't want to travel in time, glimpsing the dinosaurs or peeking at humans 2,000 years from now? Now physicists have designed a time machine that seems deceptively simple.
Numerous data show black students are kicked out of school at disproportionate rates. Rido/www.shutterstock.com

How activists are fighting racial disparities in school discipline

A grassroots movement to end racial disparities in schoolhouse discipline is beginning to take root throughout the nation and winning important victories at the local level. Can it sustain the effort?
President George H.W. Bush in 1990. Mark Reinstein/www.shutterstock.com

George H.W. Bush laid the foundation for education reform

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.
Sgt. Ron Helus, killed by gunshot Nov. 8, 2018, was remembered and honored at his funeral Nov. 14, 2018. Al Seib /Los Angeles Times via AP, Pool

Forget lanes – we all need to head together toward preventing firearm injury

In response to the NRA telling doctors to 'stay in their lane' on gun control, doctors loudly and clearly came back with this response: This is our lane. A surgeon explains their concern and urgency.
Vaccine work because they help create herd immunity. JPC-PROD/Shutterstock.com

3 ethical reasons for vaccinating your children

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.

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