The crests (bright) and troughs (dark) of waves spread out after they were produced. The picture applies to both light and sound waves.
Most people are familiar with lasers. But what about a laser made with sound rather than light? A couple of physicists have now created one that they plan to use for measuring imperceivable forces.
A silica sphere with a radius of 50 nanometers is trapped levitating in a beam of light.
J. Adam Fenster, University of Rochester
The discovery and development of optical tweezers won the 2018 Nobel Prize in physics. Now physicists are using this tool to crack some of the fundamental questions behind how the universe works.
Americans have long differed over whether patriotism should be pushed in their nation’s schools.
As debates over protests during the national anthem continue to rage, two scholars examine how legal and moral battles over the merits of patriotism in public schools have been playing out for years.
Is this a face or a building?
Building features can be analyzed in the same way that facial recognition software works, revealing previously hidden elements of history.
What’s north would become south.
Are we headed to a magnetic reversal and all the global disruption that would bring? Enter archaeomagnetism. A look at the archaeological record in southern Africa provides some clues.
Seddique Mateen, the father of Omar Mateen, grabs a photographer’s lens at his home.
Orlando shooter Omar Mateen's father has denounced homosexuality, while many say Mateen secretly grappled with his own sexuality. Here's what the research says on the relationship between parents' attitudes, being closeted and being homophobic.
The Sykes-Picot Agreement was the result of secret deliberations between British civil servant Mark Sykes and French diplomat François Georges-Picot.
The Sykes-Picot Agreement created the modern Middle East. It represents one of the first installments in a long line of modern European – and subsequent American – meddling in the region.
Parade militaire à Raqqa, dans le nord de la Syrie, en 2014.
Stringer / Reuters
La capacité de la religion à ne pas s’embarrasser de nuances entre « fidèles » et « infidèles », ou entre le « bien » et le « mal », en fait une idéologie redoutable aux mains de démagogues.
Islam is a rich and varied religion.
Since Islam is predicated on law, variations in the interpretation of that law – along with geography and distinct legal schools – have all contributed to differences in the religion.
Islamic State fighters on a tank take part in a military parade along the streets of northern Raqqa province.
Despite what we're told, religion isn't inherently peaceful. People kill in the name of their religion, just as they love in its name.
Could MOOCs transform higher ed?
A scholar who has taught 250,000 students worldwide through the Massive Open Online Courses (MOOCs) reflects on the changes that these courses are bringing. Should all those in higher ed be worried?
Is Black Friday already a relic?
'Christmas creep' is pushing the holiday shopping season earlier and earlier. Has Black Friday – its traditional start – lost its luster?
The Byrds in 1965.
Sony Music Entertainment
Fifty years ago, in the first half of 1965, the British invasion was officially under way – at least, in music. It seemed like all the biggest hits on the American pop charts came from British bands. Ever…
Stopping the summer slide through books.
Want to stop kids from sliding academically over the summer? Why not trust them to make their own reading choices?
The US version of the Rollings Stones’ 1965 LP Out of Our Heads featured Satisfaction.
Fifty years ago, the Rolling Stones released their breakthrough single (I Can’t Get No) Satisfaction, which debuted in the US during the first week of June 1965. The band’s previous singles had done well…
BB King performs in Hamburg, Germany in this 1971 photograph.
Before being crowned the "King of the Blues," a young Riley King honed his on-stage persona and made crucial contacts as a radio DJ.
Art as labor.
Courtesy of the Fine Arts Collection, U.S. General Services Administration; WPA, Federal Art Project, 1935-1943
Why do we need the humanities? A scholar of arts revisits a moment in the 1930s to emphasize the importance of creative work and its value in our education.
Kurt or Kurdt?
It's important not to conflate and confuse Cobain's varying personas.
Ruined temples in Kathmandu.
The earthquake in Kathmandu – a popular tourist destination – killed both locals and visitors. Here's what travelers can do to pack for geohazards.
In ‘The Last Time,’ the band’s country, gospel and blues influences would be put on display.
The band's first US hit wasn't 'Satisfaction.' Released in March 1965, 'The Last Time' possessed stylistic flairs that would predict the band's future success.