Butterflies likely split from nocturnal moths around 100 million years ago in present-day western North America or Central America, a new study of the winged insects finds.

This week’s Medical Minute discusses an IDO Inhibitor, which - when combined with chemotherapy and/or radiation therapy - could become part of first-line treatment for children with a variety of cancers. 

Sharks are ectotherms and their internal body temperatures usually reflect the waters they swim in. Holding their breath helps them function in the frigid deep.

Astronomers pointed the James Webb Space Telescope at a common kind of planet that's bigger than Earth but smaller than Neptune. What they saw wasn't what they expected.

This week’s Medical Minute discusses how insomnia can worsen the impact of schizophrenia and a therapeutic that may be the answer for some patients. 

For the first time, astronomers have caught a star in the act of swallowing a planet, providing a glimpse into how the sun may eventually eat up Earth.

Scientists have decoded streams of words in the brain using artificial intelligence and the data from MRI scans.

A group of economists conducted one of the first empirical studies of "generative AI" at a real-world company. They found it had big effects.

There's already a huge demand for existing weight-loss drugs, so the new medication is highly anticipated. Obesity affects an estimated 650 million adults globally.

Researchers have examined the genomes of 240 mammal species. The project reveals when mammals evolved, how some developed the ability to hibernate, and clues that may help explain humans' brains.

This week's Medical Minute discusses work scientists are doing that will force metastatic cancer cells to express a protein that draws cancer-killing T-cells right to the spreading cancer's doorstep.

This week’s Medical Minute discusses a new study that appears to identify an increased prevalence of disease-causing gene variants in women with unexplained infertility. 

Researchers have found a system in the brain that seems to integrate control of individual muscles with a person's intentions, emotions and entire body.

Scientists found evidence of two interleaved systems, which may help explain the connection between what's going on in our bodies and what's going on in brain areas involved in thoughts and emotions.

Boys born to mothers who got COVID-19 while pregnant seem to have a higher risk of subtle developmental delays, including those associated with autism spectrum disorder.