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.
Leto Sapunar
From this contributor
Pinning hope to ketamine
Doctors can prescribe it, but evidence that ketamine eases autism traits is still preliminary.
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20 March 2026 | 5 min read
Frameshift: How Caitlin Vander Weele made science communication her business
Her favorite part of research was talking about it. So she left academia and turned that passion into a successful company.
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Katie Moisse
19 March 2026 | 6 min read
Signs of aging vary across brain cells
Senescence presents differently depending on the cell type, toxic trigger and neighboring cells, two new studies find.
Signs of aging vary across brain cells
Senescence presents differently depending on the cell type, toxic trigger and neighboring cells, two new studies find.
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Claudia López Lloreda
18 March 2026 | 4 min read