
Testosterone Therapy Is Booming. But Is It Actually Safe?
As more men turn to testosterone replacement therapy (TRT) for energy, mood and muscle, experts warn the risks are still not fully understood.
Stephanie Pappas is a freelance science journalist based in Denver, Colo.
Testosterone Therapy Is Booming. But Is It Actually Safe?
As more men turn to testosterone replacement therapy (TRT) for energy, mood and muscle, experts warn the risks are still not fully understood.
Flesh-Eating ‘Screwworm’ Parasites Are Headed to the U.S.
Screwworm parasites primarily infect livestock, but human cases have risen in Central America after the pests escaped containment
The Truth about Testosterone
To boost mood and manliness, men are spending lots of money on the hormone testosterone—yet they may see trouble instead of benefits
World’s Biggest Digital Camera Will Release Its First Photos of the Night Sky. Here’s How to Watch Live
The first images of the cosmos taken by the world’s largest digital camera onboard the Vera C. Rubin Observatory are about to be released to the public. Here’s how to watch the action live
This Ant Has a Sting Worse Than a Fire Ant’s—Here’s How to Avoid It
The Asian needle ant looks ordinary, but its sting can be worse than a fire ant’s and can be dangerous for anyone who has experienced anaphylaxis
These Climbers Summited Mount Everest in Record Time. Did Inhaling Xenon Help?
British climbers recently reached the top of Mount Everest in record time. They inhaled xenon gas before the trip. But was that the decisive factor?
Vitamin D May Slow Cells’ Aging
Vitamin D supplements may help prevent the loss of telomeres, DNA sequences that shrink with aging, a large study shows. But the health effects aren’t yet clear
Remember VIPER, NASA’s Off-Again, On-Again Lunar Rover? It’s Still in Limbo
NASA’s nearly complete yet canceled lunar rover VIPER isn’t going to get carried to the moon by a private space exploration company—but it’s also not quite dead yet
Shuttering of EPA’s Energy Star Program Would Affect Electric Bills and the Environment
Hit by restructuring, the EPA is reportedly planning to end the Energy Star program, a project that has saved hundreds of billions of dollars for businesses and consumers
Could a Monster Earthquake Actually Sink Parts of the Pacific Northwest?
A new study is fueling speculation and fear about the risks of a major earthquake in the Cascadia subduction zone, including massive flooding in California
Why New Jersey Is Actually a Place with Major Wildfire Risk
A forest fire that erupted in New Jersey and spread overnight highlights the major wildfire risk faced by the state and other urban areas
RFK, Jr., Is Wrong about Cause of Rising Autism Rates, Scientists Say
Autism rates are rising, but RFK, Jr., is wrong about the reasons. Here’s what the science says
Trump’s Cornell Funding Freeze Could Make U.S. Troops Less Safe
Cornell is being slammed with stop-work orders that will seriously impact department of defense research linked to the Air Force and military safety, sources tell Scientific American
Why the New ‘Torpedo Bat’ Is Hitting It out of the Park
After a stellar Yankees win on Saturday, torpedo bats are in the spotlight. Is there science behind these baseball bats?
RFK, Jr., Wants to Let Bird Flu Spread on Poultry Farms. Why Experts Are Concerned
Secretary of Health and Human Services Robert F. Kennedy, Jr., has repeatedly suggested that farmers should let bird flu spread through flocks. Experts explain why that’s a dangerous idea
What Is Chloroprene, the Cancer-Causing Chemical at the Center of a Federal Lawsuit?
Trump could drop a federal lawsuit against a petrochemical plant that emits chloroprene. Here’s a look at the cancer-causing chemical
Why DeepSeek’s AI Model Just Became the Top-Rated App in the U.S.
A Chinese start-up has stunned the technology industry—and financial markets—with a cheaper, lower-tech AI assistant that matches the state of the art
How Will Fire Investigators Trace the Source of the L.A. Wildfires?
Wildfires like the Los Angeles blazes destroy so much, but they often spare some evidence of the cause of their ignition
Palisades and Eaton Fires Show Rising Dangers of Fast-Moving Blazes
In California and elsewhere, fast-moving fires are particularly damaging and expensive because they take people by surprise, making evacuations difficult
When Did Neandertals and Humans Interbreed? Genomics Closes In on a Date
The oldest human genomes ever sequenced reveal that our Neandertal ancestry came from one “pulse” of interbreeding and pins down the timing
Could Plate Tectonics Crack Open Earth’s Deepest Mystery?
Plate tectonics, or the recycling of Earth’s crust, may have begun much earlier than previously thought—and may be a big reason that our planet harbors life
World’s Oldest Alphabet Found on an Ancient Clay Gift Tag
A finger-sized clay cylinder from a tomb in northern Syria appears to be the oldest example of writing using an alphabet rather than hieroglyphs or cuneiform
Invasive Joro Spiders Keep Their Cool Even when Stressed
Compared with other arachnids, invasive Joro spiders are calm, cool and collected under stress, a new study shows
‘Brain-Eating’ Amoeba Infections Are Almost Always Fatal. New Treatments Are Coming
New drugs may help patients with life-threatening "brain-eating" amoeba infections