A group of scientists studying pregnancy across six different mammals—from humans to marsupials—uncovered how certain cells at the mother-baby boundary have been working together for over 100 million years. By mapping gene activity in these cells, they found that pregnancy isn’t just a battle between mother and fetus, but often a carefully coordinated partnership. These ancient cell interactions, including hormone production and nutrient sharing, evolved to support longer, more complex pregnancies and may help explain why human pregnancy works the way it does today.

Researchers testing urine from 2- to 4-year-olds in four U.S. states uncovered 96 different chemicals, many of them unmonitored and linked to hormone and brain disruption. Legacy toxins like triclosan are slowly declining, yet replacements such as DINCH plasticizer and modern pesticides are rising. Toddlers—especially the youngest, later-born, and those from minority groups—often carried higher levels than their own mothers. Scientists urge expanded biomonitoring and stricter regulations before these invisible pollutants derail early development.

Teen vaping is changing fast — and not in a good way. A large national study found that more adolescents are vaping THC, CBD, and especially synthetic cannabinoids, which are often unregulated and far more dangerous. Even more troubling, many teens don’t know what’s in their vape pens at all. Researchers also found that girls are now more likely than boys to vape these substances. As these mysterious and risky chemicals gain popularity, scientists are sounding the alarm about the urgent need for better education, regulation, and awareness.

Teens are being misled by cannabis edibles dressed up like health foods. Bright colors, fruit imagery, and words like vegan make these products look fun, natural, and safe even when they re not. A WSU study warns that this could increase the risk of underage use and urges new packaging rules based on what actually appeals to teens.

With summer temperatures rising, health officials are reminding everyone to take precautions against heat-related illness. High heat and humidity make it harder for the body to cool itself, increasing the risk of heat exhaustion or heat stroke. Teens, athletes, young children, and people with health conditions are especially at risk.

To stay safe, drink plenty of water, wear lightweight clothing, and avoid outdoor activity during peak heat hours (10 a.m. to 4 p.m.). Spend time in air-conditioned places when possible, and never leave people or pets in parked cars. Staying informed and prepared can prevent serious health problems.

Teens might finally have a good reason to sleep in on weekends within limits. A new study reveals that teenagers who get up to two extra hours of sleep on weekends show fewer anxiety symptoms than those who don t. But go beyond that sweet spot, and symptoms can actually increase.

A growing number of teens are rethinking the traditional college path. According to a new survey from American Student Assistance, only 45 percent of students in grades 7–12 expect to attend a two- or four-year college, down from 73 percent in 2018. Meanwhile, interest in nondegree options like trade schools, apprenticeships, and “boot camps” has increased significantly, rising to 38 percent.

School counselors say it’s important for students to explore all available pathways after high school. Despite a lingering stigma around non-college options, many teens are focused on finding the best route to a successful career. Planning early and identifying personal strengths can help students make informed decisions about their futures.

Teens are diving into intense skincare routines inspired by TikTok, often slathering on six or more products daily, sometimes over ten in just minutes, chasing beauty ideals that favor lighter, flawless skin. But new research warns this digital trend comes at a high cost: irritation, allergies, and deep-seated social pressures around race and beauty.

Making a discovery with the potential for innovative applications in pharmaceutical development, a microbiology student has found a long sought-after fungus that produces effects similar to the semisynthetic drug LSD, which is used to treat conditions like depression, post-traumatic stress disorder and addiction.

A new report from the Environmental Working Group (EWG) shows that most sunscreens on store shelves aren’t as safe or effective as you’d think. Out of over 2,200 products tested, fewer than 500 actually protect your skin the way they should. Some even include sketchy ingredients that could mess with your hormones or increase health risks.

The report calls out outdated rules and sneaky marketing that make it hard to know what’s safe. If you want to protect your skin (and avoid sunburns or worse), stick to lotions or sticks instead of sprays, go for fragrance-free options, and look for the EWG Verified® label. And don’t forget: Reapply often, wear a hat and sunglasses, and try to stay out of direct sun from 10 a.m. to 4 p.m.