
Megalodon Diets, Teeth Sensitivity and a Bunch of Vaccine News
It’s one step forward and two steps back for vaccine policy in the U.S. Plus, we discuss the fishy origins of sensitive teeth and megalodon diets.
Alex Sugiura is a Peabody and Pulitzer Prize–winning composer, editor and podcast producer based in Brooklyn, N.Y. He has worked on projects for Bloomberg, Axios, Crooked Media and Spotify, among others.

Megalodon Diets, Teeth Sensitivity and a Bunch of Vaccine News
It’s one step forward and two steps back for vaccine policy in the U.S. Plus, we discuss the fishy origins of sensitive teeth and megalodon diets.

Global Flourishing Study Reflects Youth Struggles and Ripple Effects of Childhood Challenges
Young people are struggling; retirees are happier than employees; people in partnerships are flourishing more than those who are single. Hear the first takeaways from the Global Flourishing Study.

This Male Fertility Test Makes Assessing Sperm Health a More Accurate At-Home Affair
A new study suggests a way to more accurately test sperm health from home.

Building an LLM for Dolphin Chatter
A large language model for dolphin vocalization could let us better understand these beloved marine mammals.

Could Mitochondria Be Rewriting the Rules of Biology?
New discoveries about mitochondria could reshape how we understand the body’s response to stress, aging and illness

Accidental Alchemy, Flamingo Food Tornado, and Kosmos-482 Lands
Kosmos-482 crash-lands, physicists turn lead to gold and animals show some clever behaviors.

Polar Geoengineering Experiments Bet Big on Freezing Arctic Ice
Refreezing the melting sea ice in the Arctic is more complicated than you would think. The U.K. is funding geoengineering experiments like this one to curb the effects of climate change.

Declining MMR Vaccination Rates Make West Texas Outbreak a Threat to Measles Elimination
High vaccination rates eliminated measles in the U.S. An outbreak that began in West Texas is threatening to overturn that status.

Sinking Cities, Waving Cuttlefish and Falling Spacecraft
A spacecraft is set to fall from the skies, 28 U.S. cities slowly sink, and a new study pinpoints how the overindulgence of the wealthy contributes to massive warming.

Fitness Doesn’t Have to Be about Denial and Shame
Author Casey Johnston presents a new way to think about fitness in her new book A Physical Education

Jupiter’s Cyclones, Amazon’s Satellites and T. rex Collagen
Climate studies are paused, new satellites join the crowded skies, the Juno spacecraft studies Jupiter, and biotech companies will create T. rex leather (or will they?).

These Fungi Are Facing Extinction—Here’s Why That Matters
As conservation targets, fungi aren’t as appealing as giant pandas. But these scientists explain that the health of Earth’s fungal species is critically important.

AI Offers Digital Immortality for Deceased Loved Ones—But Should It?
AI chatbots called “griefbots” or “deadbots” offer our loved ones a new digital way to grieve but raise ethical and privacy concerns.

Solar Shadow Play, Seances for Science, and More from Our 1925 Coverage
We present a historical romp through Scientific American—100 years ago.

How to Find Hidden Nature in Any Urban Park Near You
Take a walk through Prospect Park with Wild NYC writer Ryan Mandelbaum and learn to connect with nature no matter how urban your environment is.

Misunderstood and Maligned Snakes Are Worthy Of Our Sympathy
In a new book called Slither, Stephen S. Hall takes a deep dive into the biology and history of one of the most reviled animals.

Public Health Focuses on Childhood, Magnetic Poles Once Wandered, and Colossal Squid Discovered
This week’s news roundup covers measles and whooping cough cases, evidence of a carbon cycle on Mars and the first glimpse at a colossal squid in its natural habitat.

The Past 35 Years of Science and Technology from Our Editor Gary Stix’s Perspective
Hear takeaways from 35 years at Scientific American from Gary Stix, our recently retired mind and brain editor.

A Nontoxic Disinfectant That Is Safe for Surfaces and Skin
Hypochlorous acid has a lot of buzz in the beauty industry, but this nontoxic disinfectant has many possible uses.

A Long Day on Uranus, a Better Method of Making Coffee and Disputed Dino Decline
A fluid study homes in on the best method to make a cup of coffee, scientists use the Hubble Telescope to reassess the length of a day on Uranus, and we discuss more of the latest in science in this news roundup.

How Is This Prenatal Blood Test Detecting Cancer in Pregnant Patients?
Researchers are trying to understand how a common prenatal blood test called NIPT is detecting cancer in some pregnant patients.

Bacterial Vaginosis Sometimes Acts like an STI
Bacterial vaginosis is an irritating overgrowth of pathogenic bacteria. A new study has found that some cases of the condition should be treated like a sexually transmitted infection.

American Lifespans, Monkeys That Yodel, Measles, and More
States sue HHS for public health cuts, measles cases continue to rise, and a study finds Americans live shorter lives compared with their European counterparts.

Losing USAID’s Public Health Programs Imperils the World
USAID is responsible for global health efforts that have saved the lives of millions of children. What happens when those programs are cut?