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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Grant review needs reform. How about we add an element of chance?
A process that uses a lottery system saves time, reduces strategic resubmission and accepts that, above a quality threshold, luck has always played a part in science funding.
Grant review needs reform. How about we add an element of chance?
A process that uses a lottery system saves time, reduces strategic resubmission and accepts that, above a quality threshold, luck has always played a part in science funding.
By
Adrien Peyrache
25 September 2026 | 6 min read
Fly neurons carry molecular signatures of their origins
The pattern of transcription factors a Drosophila neuron expresses offers clues to its lineage and birth order—and ultimately how neural circuits emerge.
Fly neurons carry molecular signatures of their origins
The pattern of transcription factors a Drosophila neuron expresses offers clues to its lineage and birth order—and ultimately how neural circuits emerge.
By
Alissa de Chassey
25 September 2026 | 5 min read
Polarized cortical organoids mimic the brain’s regional organization
The organoids show region-specific gene-expression changes that match those observed during fetal development.
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