Leto Sapunar headshot

Leto Sapunar


Leto Sapunar is a freelance science journalist covering physics, space, climate and science accountability since 2020. He has been writing for Popular Science since early 2021, and his work can also be found in Scientific American, Inside Climate News and Retraction Watch, among other outlets.

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Diabetes researcher from NOVA Medical School, Portugal, shows how mice used to study blood glucose regulation, memory changes and metabolic processes associated with diabetes are kept in laboratory.

Public engagement can help cultivate support for animal research

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By Kirk Leech
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Brain registers spatial location outside hippocampus

A more complex picture of how an animal’s brain tracks its location is starting to emerge.

By Natalia Mesa
5 November 2026 | 1 min watch
Illustration of worm on top of a purple rock with neurons in the background.

The three-banded panther worm is rewriting the story of brain evolution

The animal has a brain structure all its own, according to a 2026 preprint. The finding hints that brains could have evolved centralization before regionalization.

By Sarah DeWeerdt
4 November 2026 | 7 min read