Your Future Smartphone May Detect Problems in Your Water

Biosensors on a touchscreen are showing promise for detecting arsenic and lead in water.

Photo by Johnny McClung on Unsplash

In 2014, the city of Flint, Michigan switched the residents' water supply to the Flint river, citing cheaper costs. However, due to improper filtering, lead contaminated this water, and according to the Associated Press, many of the city's residents soon reported health issues like hair loss and rashes. In 2015, a report found that children there had high levels of lead in their blood. The National Resource Defense Council recently discovered there could still be as many as twelve million lead pipes carrying water to homes across the U.S.

What if Flint residents and others in afflicted areas could simply flick water onto their phone screens and an app would tell them if they were about to drink contaminated water? This is what researchers at the University of Cambridge are working on to prevent catastrophes like what occurred in Flint, and to prepare for an uncertain future of scarcer resources.

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Hanna Webster
Hanna Webster is a freelance science writer based in San Diego, California. She received a Bachelor’s degree in neuroscience and creative writing in 2018 from Western Washington University, and is now a graduate student in the MA Science Writing program at Johns Hopkins University. She writes stories about neuroscience, biology, and public health. Her essays and articles have appeared in Jeopardy Magazine and Leafly. When Hanna is not writing, she enjoys consuming other art forms, such as photography, poetry, creative nonfiction, and live music
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Scientists Jason Schrum and Kerry Benenato solved crucial challenges in mRNA vaccine development.

Photo credit: LinkedIn

In early 2020, Moderna Inc. was a barely-known biotechnology company with an unproven approach. It wanted to produce messenger RNA molecules to carry instructions into the body, teaching it to ward off disease. Experts doubted the Boston-based company would meet success.

Today, Moderna is a pharmaceutical power thanks to its success developing an effective Covid-19 vaccine. The company is worth $124 billion, more than giants including GlaxoSmithKline and Sanofi, and evidence has emerged that Moderna's shots are more protective than those produced by Pfizer-BioNTech and other vaccine makers. Pressure is building on the company to deliver more of its doses to people around the world, especially in poorer countries, and Moderna is working on vaccines against other pathogens, including Zika, influenza and cytomegalovirus.

But Moderna encountered such difficulties over the course of its eleven-year history that some executives worried it wouldn't survive. Two unlikely scientists helped save the company. Their breakthroughs paved the way for Moderna's Covid-19 shots but their work has never been publicized nor have their contributions been properly appreciated.

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Gregory Zuckerman
Gregory Zuckerman is a Special Writer at the Wall Street Journal where he writes about business, economic, and investing topics. He's a three-time winner of the Gerald Loeb award, the highest honor in business journalism. Zuckerman regularly appears on such media outlets as CNBC, Fox, MSNBC, and is the author of A Shot to Save the World, The Greatest Trade Ever, The Frackers, and The Man Who Solved the Market.  

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Kira Peikoff

Kira Peikoff is the editor-in-chief of Leaps.org. As a journalist, her work has appeared in The New York Times, Newsweek, Nautilus, Popular Mechanics, The New York Academy of Sciences, and other outlets. She is also the author of four suspense novels that explore controversial issues arising from scientific innovation: Living Proof, No Time to Die, Die Again Tomorrow, and Mother Knows Best. Peikoff holds a B.A. in Journalism from New York University and an M.S. in Bioethics from Columbia University. She lives in New Jersey with her husband and two young sons. Follow her on Twitter @KiraPeikoff.