+ lead poisoning, leprosy and hammerhead shark embryos US Edition - Today's top story: Salty foods are making people sick â in part by poisoning their microbiomes [View in browser]( US Edition | 13 March 2024 [The Conversation]
[The Conversation]( From padding the salaries of ancient Roman soldiers to preserving foods across civilizations, salt has long played an essential role in maintaining human health and well-being. Its reputation over the past few decades, however, has undergone a 180, with doctors and public health officials raising the alarm that the average American diet is too salty for our own good. The list of negative health effects linked to excess dietary salt is long and growing â high blood pressure, cardiovascular disease, obesity and cancer, among others. How exactly excess salt contributes to disease is still under study. But gastroenterologist Chris Damman of the University of Washington points to its ability to [short-circuit the gut microbiome](, killing off healthy microbes and leaving behind ones that may hurt your body when left unchecked. Luckily, there are ways to limit the effects of too much salt in your diet. For the sake of your gut and the microbes that help keep you healthy, Damman suggests, a pinch less might better hit the spot. Also in this weekâs science news: - [What happens to solar power during an eclipse](
- [Approved: over-the-counter birth control pill](
- [âDarkâ fishing vessels and risk for marine species]( If thereâs a subject youâd like our team of science editors to investigate, please reply to this email. Vivian Lam Associate Health and Biomedicine Editor
Salt has taken over many diets worldwide â some more than others. ATU Images/The Image Bank via Getty Images
[Salty foods are making people sick â in part by poisoning their microbiomes]( Christopher Damman, University of Washington Salt is an essential nutrient that has helped civilizations flavor and preserve their foods for millennia. Too much dietary salt, however, is linked to a host of health problems.
The USS Portland test-fires a laser weapon. The photo captured infrared light to make the beam visible. Staff Sgt. Donald Holbert/Marine Corps via AP
[High-energy laser weapons: A defense expert explains how they work and what they are used for]( Iain Boyd, University of Colorado Boulder Militaries around the world are rapidly developing science fiction-like laser weapons, motivated in part by the growing threat from swarms of drones.
Womenâs own negative medical experiences influence their vaccine decisions for their kids. AP Photo/Ted S. Warren
[Vaccine-skeptical mothers say bad health care experiences made them distrust the medical system]( Johanna Richlin, University of Maine Vaccine skepticism, and the broader medical mistrust and far-reaching anxieties it reflects, is not just a fringe position in the 21st century. [Solar power occupies a lot of space â hereâs how to make it more ecologically beneficial to the land it sits on]( Matthew Sturchio, Colorado State University Solar development isnât always good for the land, but pairing it with agriculture can produce multiple benefits. [Opill, the first over-the-counter birth control pill, will be on shelves soon â here are some key things to know]( Sarah Lynch, Binghamton University, State University of New York Once available, Opill will be the most effective form of nonprescription birth control on the market. But you should still speak with your health care provider about any questions. [Rare access to hammerhead shark embryos reveals secrets of its unique head development]( Gareth J. Fraser, University of Florida Because hammerhead sharks give birth to live young, studying their embryonic development is much more complicated than harvesting some eggs and watching them develop in real time. [Lead from old paint and pipes is still a harmful and deadly hazard in millions of US homes]( Aaron Specht, Purdue University Although the US banned lead-based paint in 1978, homes built before then commonly contain lead paint. [Why do trees need sunlight? An environmental scientist explains photosynthesis]( Rebekah Stein, Quinnipiac University Trees â and all plants â harvest sunlight to gain the energy they need to live and grow. [Surviving fishing gear entanglement isnât enough for endangered right whales â females still donât breed afterward]( Joshua Reed, Macquarie University; Leslie New, Ursinus College; Peter Corkeron, Griffith University; Rob Harcourt, Macquarie University Even when female North Atlantic right whales survive entanglement in fishing gear, it may affect their future ability to breed, increasing the pressure on this critically endangered species. -
[Titanosaurs were the biggest land animals Earthâs ever seen â these plant-powered dinos combined reptile and mammal traits]( Kristi Curry Rogers, Macalester College Some of these giant vegetarians were as tall as a 3-story building. Microscopic analysis of their teeth, bones and eggshells reveals how they grew, what they ate and even their body temperature. -
[Aprilâs eclipse will mean interruptions in solar power generation, which could strain electrical grids]( Vahe Peroomian, USC Dornsife College of Letters, Arts and Sciences When the Moon blocks the Sun during an eclipse, utility suppliers have to pull power from the grid to make up for gaps in solar energy. -
[Are private conversations truly private? A cybersecurity expert explains how end-to-end encryption protects you]( Robin Chataut, Quinnipiac University End-to-end encryption provides strong protection for keeping your communications private, but not every messaging app uses it, and even some of the ones that do donât have it turned on by default. -
[Sharks, turtles and other sea creatures face greater risk from industrial fishing than previously thought â we estimated added pressure from âdarkâ fishing vessels]( Heather Welch, University of California, Santa Cruz The toll on wildlife from illegal fishing, bycatch and entanglement in fishing gear is likely underestimated, because it doesnât account for âdarkâ fishing vessels, a new study finds. -
[NASAâs search for life on Mars: a rocky road for its rovers, a long slog for scientists â and back on Earth, a battle of the budget]( -
[Leprosy cases are rising in the US â what is the ancient disease and why is it spreading now?]( -
[Total solar eclipses, while stunning, can damage your eyes if viewed without the right protection]( -
[Immune cells can adapt to invading pathogens, deciding whether to fight now or prepare for the next battle]( - - Like this newsletter? You might be interested in our weekly emails: - [Politics Weekly]( ⢠[This Week in Religion]( ⢠[Weekly Highlights]( ⢠[Global Economy & Business]( -
-
About The Conversation: We're a nonprofit news organization dedicated to [helping academic experts share ideas with the public](. We can give away our articles thanks to the help of foundations, universities and readers like you. [Donate now to support research-based journalism]( [The Conversation]( Youâre receiving this newsletter from [The Conversation]( 303 Wyman Street, Suite 300 Waltham, MA 02451 [Forward to a friend]( • [Unsubscribe](