Carrie Arnold


Carrie Arnold is a Virginia-based freelance science journalist who covers many aspects of the living world. She’s a contributing editor at NOVA Next, and has also written for Mosaic, National Geographic, Aeon, Nautilus, Scientific American and Women’s Health. She is also the author of “Decoding Anorexia: How Breakthroughs in Science Offer Hope for Eating Disorders.”

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Cortical organoids from the anterior (green) or posterior (red) cortex.

Polarized cortical organoids mimic the brain’s regional organization

The organoids show region-specific gene-expression changes that match those observed during fetal development.

By Holly Barker
24 September 2026 | 4 min read
Research diagram of gene expression.

Prefrontal cortex has three transcriptomic acts across human lifespan, new atlas suggests

Various genes show distinct exits and entrances with age in the open-source dataset, the largest of its kind to date.

By Siddhant Pusdekar
23 September 2026 | 5 min read

Microglia scoop out garbage from inside neurons

Through a newly identified process called skoupocytosis, neurons recruit the immune cells to remove cellular waste they find hard to deal with themselves.

By Siddhant Pusdekar
23 September 2026 | 0 min watch