As genes are favored or phased out, human evolution continues.
Comparing genomes of more than 200,000 people, researchers identified genetic variants that are less common in older people, suggesting natural selection continues to weed out disadvantageous traits.
A photograph of Penn Station’s interior from the 1930s.
We asked five architecture experts to name one building or structure they wish had been preserved, but couldn't resist the tides of decay, development and discrimination.
Ryan Kelly’s iconic photograph of the moment that James Fields’ car plowed into a crowd of protestors in Charlottesville, Virginia.
Ryan M. Kelly/AP
Ryan Kelly's iconic photograph from Charlottesville evokes a 'Unite the Right' moment from 1937 – and the anti-war masterpiece by Picasso that emerged from it.
When is it too hot to fly?
Major airports around the world will see more frequent flight restrictions in the coming decades because of increasingly common hot temperatures.
There have been successive large scale droughts in East Africa.
It's very easy to assume climate change causes droughts, but they are complex extreme events that result from a combination of drivers.
People have always asked for alms, including the men depicted in this 17th-century European etching.
Wenceslaus Hollar/The Metropolitan Museum of Art
The courts are saying that down-and-out Americans have a right to seek curbside alms despite efforts to ban the practice. Two scholars have come up with an alternative to anti-panhandling ordinances.
Donald Trump might not spend much time on social media, but he has an acute understanding of how virality in media works.
There are four key things Donald Trump’s election tells us about the state of journalism today.
Like many cities, Manchester can demonstrate strength through diversity, but must face down the forces that would see it divided.
People protest Comey’s firing in Los Angeles on May 10, 2017.
AP Photo/Reed Saxon
The author of a seminal work in the field of political psychology reveals two big mistakes the president made.
Trump seen through a TV camera’s viewfinder in Harrisburg, Pennsylvania on April 29, 2017.
AP Photo/Patrick Semansky
Liberals who are counting down the days until Election Day 2020 may need to revise their math. Getting rid of a sitting president isn't easy to do.
How does bad data affect predictive policing algorithms?
Crime data reflect only what crimes are identified by the police – not all the crimes that occur. So decisions based on crime data are necessarily biased and incompletely informed.
Students for a Democratic Society was the largest – and arguably most successful – student activist organization in U.S. history.
S.Sgt. Albert R. Simpson, Department of Defense / via Wikimedia
Student protest has been in the political spotlight since Trump's election. Todd Gitlin, former president of Students for a Democratic Society, shares his perspective on protest in the 60s and now.
Everyone looks for price, but there are smarter ways to communicate fuel efficiency on car labels.
It's all in the presentation: In studies, consumers were more apt to choose fuel-efficient vehicles depending on how the same pieces of information were displayed on labels.
Our cells have a built-in genetic clock, tracking time… but how accurately?
Stopwatch image via www.shutterstock.com.
How do scientists figure out when evolutionary events – like species splitting away from a common ancestor – happened? It turns out our DNA is a kind of molecular clock, keeping time via genetic changes.
Let the games begin.
March Mammal Madness, a tournament of imaginary contests between pairs of mammals, makes science irreverent and fun. The event has thousands of fans and is used in hundreds of classrooms.
Will voters of the future swing left or right?
Cropped from joebeone/flickr
As America becomes more diverse, many think it will also become more progressive. But one analysis of demographic trends points to gains for Republicans.
In the wrong hands, ‘nudges’ can be used in nefarious ways.
Marionette strings via www.shutterstock.com
Dozens of governments have been using the insights from the burgeoning field to 'nudge' citizens in ways that improve their well-being. But some worry Trump might use it for less altruistic ends.
A worker at the Wynwood Community Service Center hands a local resident a can of insect repellent Aug. 4, 2016, in Miami.
AP Photo/Alan Diaz
We need to take a close look at how primary care systems function in places at great risk of epidemic disease, and what we can do to make these systems more resilient.
People power is helping bring an end to impunity in Brazil.
Eraldo Peres/AP Photo
By exposing, prosecuting and sentencing Brazil's corrupt politicians, prosecutors, judges and citizens are draining the swamp that has overwhelmed the country for so long.
Residents take part in the Olympic Flame torch relay in Gravata, Pernambuco state, Brazil, May 31, 2016.
Being Brazilian in the US means navigating an identity that doesn't neatly fit into a single check-box, and can be perceived in vastly different ways depending on what part of the country you're in.