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This skull, found in France, was among the first fossils to be recognized as belonging to our own species. DEA /G. Cigolini via Getty Images

How did humans evolve, and will we evolve more?

Our biggest evolutionary advantages are an ability to walk on two legs and our big brains.
El sobrino de Floyd, Brandon Williams (centro), con el reverendo Al Sharpton (izquierda) fuera del tribunal en Minneapolis, Minnesota, antes de que comenzara el juicio por asesinato del oficial Derek Chauvin, el 29 de marzo de 2021. Stephen Maturen / Getty Images

Comenzó el juicio contra el policía que asesinó a George Floyd: 5 lecturas esenciales sobre la violencia policial contra los hombres negros

La muerte de Floyd, quien era negro, desencadenó una ola de protestas masivas contra el racismo en Estados Unidos. Este es un resumen de importantes investigaciones sobre la violencia policial.
U.S. Border Patrol detains tens of thousands of the families and children who try to cross U.S. borders every year. AP Photo/Julio Cortez

The situation at the US-Mexico border is a crisis – but is it new?

Children and families have been fleeing to the US in rising numbers for nearly a decade. So why is the current situation at the US-Mexico border being viewed as something new?
Bay of Pigs debacle: Watched by armed guards, grim-faced US-backed invaders are marched off to prison after their capture by Fidel Castro’s forces. Bettmann via Getty Images

60 years after Bay of Pigs, New York Times role – and myth – made clear

The New York Times gave in to White House pressure and did not publish crucial information about an impending US-backed invasion of Cuba. It’s an old story, much repeated – but it’s wrong.
During the pandemic Americans turned to CBD, which purports to have calming effects. Catherine Falls Commercial/Getty Images

CBD, marijuana and hemp: What is the difference among these cannabis products, and which are legal?

Hemp, CBD and marijuana are all forms of cannabis – but they are different in significant ways, from form and legality to their potential uses as treatment for various health conditions.
People who want to restrict guns have a point, but so do people who say those laws make little difference in mass shootings. George Frey/AFP via Getty Images

In gun debate, both sides have evidence to back them up

Stricter gun control laws may make mass shootings slightly less common, but other policies may work better to prevent mass shooting deaths.
In-person learning can start as long as schools operate safely, says the CDC. Jon Cherry/Getty Images

How can all schools safely reopen?

In-person learning can safely resume as long as schools take steps to mitigate the spread of COVID-19.
An abolitionist lithograph of the slave trade in Washington, D.C., with the U.S. Capitol in the background. Library of Congress

White mobs rioted in Washington in 1848 to defend slaveholders’ rights after 76 Black enslaved people staged an unsuccessful mass escape on a boat

Riots by proslavery forces raged for three days in the nation’s capital after the capture of a ship bearing fugitive enslaved people. The president, a slaveowner himself, tried to calm the city.
Adoring fans clamor for an autograph from baseball legend Jackie Robinson in 1962, but Robinson faced slurs, hatred and insults in his early years in the majors. Bettman/

Did racism kill Jackie Robinson?

Major league baseball opens today, and few are likely to give race a thought. When Jackie Robinson integrated MLB in 1947, it was a far different story. Did racism lead to Robinson’s early death?
Sequencing the genetic code of virus samples taken from COVID-19 patients reveals how SARS-CoV-2 is spreading and changing. Nate Langer/UPMC

Genomic surveillance: What it is and why we need more of it to track coronavirus variants and help end the COVID-19 pandemic

The US lags in testing coronavirus samples from COVID-19 patients, which can help track the spread of the virus and the emergence of new variants. But labs are ramping up this crucial surveillance.