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No matter its cause, diarrhea is uncomfortable. Rapeepong Puttakumwong/Moment via Getty Images

Why do people get diarrhea?

Poop comes in many shapes, sizes and textures. The kind that’s too runny might be the result of wayward germs, Crohn’s disease or lactose intolerance.
Commercial satellite companies provide views once reserved for governments, like this image of a Russian military training facility in Crimea. Satellite image (c) 2021 Maxar Technologies via Getty Images

Technology is revolutionizing how intelligence is gathered and analyzed – and opening a window onto Russian military activity around Ukraine

National security professionals and armchair sleuths alike are taking advantage of vast amounts of publicly available information and software tools to monitor geopolitical events around the world.
According to researcher Marc-Antoine Fardin, under the right circumstances, cats’ bodies can behave like liquids. Nevena Uzurov/Moment via Getty Images

Physics and psychology of cats – an (improbable) conversation

Have you wondered why cats are so nimble and seem to fit perfectly in cups, boxes, and other small places? Or how cats communicate with humans? A physicist and a psychologist explain.
The concept of placebos – which are sometimes called “sugar pills” – has been around since the 1800s. Wladimir Bulgar/Science Photo Library via Getty Images

In research studies and in real life, placebos have a powerful healing effect on the body and mind

Drug manufacturers often shun the use of placebos in clinical trials. But research suggests that placebos could play an important role in the treatment of depression, pain and other maladies.
People are good at avoiding prying eyes, but avoiding online snoops – not so much. Donald Iain Smith/Moment via Getty Images

Your sense of privacy evolved over millennia – that puts you at risk today but could improve technology tomorrow

You have a finely honed sense of privacy in the physical world. But the sights and sounds you encounter online don’t help you detect risks and can even lull you into a false sense of security.
Minority STEM majors are more likely than their white peers to switch fields. andresr/E+ via Getty Images

4 ways to help STEM majors stay the course

Colleges don’t have to sit by and watch STEM majors leave for other fields. Two Ph.D. biology students share tips for encouraging students to stick with STEM despite the difficulty involved.
Banana plantation workers in Panama find shade under a vehicle during a break. Jan Sochor/Latincontent/Getty Images

Heat waves hit the poor hardest – calculating the rising impact on those least able to adapt to the warming climate

The risk from heat waves is about more than intensity – being able to cool off is essential, and that’s hard to find in many low-income areas of the world.
Joe Rogan’s ability to attract young male listeners is particularly powerful in today’s fractured media environment. Jeff Bottari/Zuffa LLC via Getty Image

How Joe Rogan became podcasting’s Goliath

By sidestepping partisan pigeonholing and appealing to the anti-establishment impulses of young men, Rogan has brought together an audience that advertisers have long coveted.
Palestinian artists draw a mural of hunger striker Hisham Abu Hawash. MOHAMMED ABED/AFP via Getty Images

Inmates’ hunger strikes take powerful stands against injustice

The power of the hunger strike lies in its utter simplicity. Anyone can choose to forego eating, even when living under extremely restricted conditions.
Whitney Houston sings the national anthem on January 27, 1991, at Super Bowl XXV during the Persian Gulf War. Michael Zagaris/Getty Images

A brief history of the NFL, ‘The Star-Spangled Banner,’ the Super Bowl and their tangled saga of patriotism and dissent

For the NFL, playing the national anthem started as a patriotic marketing ploy. It’s now played before every game alongside ‘Lift Every Voice,’ the Black national anthem, and ‘America the Beautiful.’