Why isn’t melatonin considered a drug? And should it be?
Walk into any U.S. pharmacy, and you’ll find a multicolored range of melatonin supplements marketed as sleep aids for adults and children alike. The body-made...
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Physicists find evidence that the universe isn’t perfectly uniform, potentially unraveling 100-year-old model of cosmology
Astronomers have developed a new way to test one of the central assumptions of modern cosmology — that the universe behaves uniformly on the largest...
Listen: Cheap Health Insurance Isn’t Always Cheap
By Jackie Fortiér April 21, 2026 Article HTML Jackie Fortiér High-deductible plans can look like a deal, until the bills start rolling in. On this...
There’s an issue with the Artemis II heat shield, but NASA isn’t worried. Here’s why.
The Artemis II astronauts are about to return from a record-setting trip around the moon, but is their Orion spacecraft’s heat shield safe to bring...
Synesthesia isn’t just in your mind. The body reacts as if the colors were real.
Some people see numbers as always having certain colors — for example, they see the number 5 as red. A new study reveals that their...
In the Affordability Alphabet Soup of the ACA and EHBs, a Link to Higher Premiums Isn’t Clear-Cut
Julie Appleby, KFF Health News When President Donald Trump unveiled his one-page outline to address health care spending, dubbed “The Great Healthcare Plan,” he specifically...
Psychedelic drug ayahuasca could treat PTSD, early studies hint. But exactly how it works isn’t clear.
EDITOR’S NOTE — This story includes discussion of suicide. If you or someone you know needs help, the national suicide and crisis lifeline in the...
‘The problem isn’t just Siri or Alexa’: AI assistants tend to be feminine, entrenching harmful gender stereotypes
In 2024, artificial intelligence (AI) voice assistants worldwide surpassed 8 billion, more than one per person on the planet. These assistants are helpful, polite —...