Headshot of Shelby Grebbin

Shelby Grebbin

Editorial Assistant

Shelby Grebbin was Spectrum’s editorial assistant. Before joining Spectrum, she was staff assistant at the Nieman Foundation for Journalism. As a freelance journalist, she has covered stories related to public health, data transparency and prison health care. Shelby has a B.A. in journalism from Emerson College in Boston, Massachusetts.

From this contributor

Explore more from The Transmitter

Ground squirrel.

How thirteen-lined ground squirrels illuminate retinal development

In most mammalian retinas, rods outnumber cones. But that ratio is flipped in ground squirrels, a quirk that helps Seth Blackshaw explore how retinal cells develop their identities.

By Sarah Thau
31 July 2026 | 5 min read
Research image of the association cortex.

Cortical territories compete in developmental space race

Sensory and association regions are established through a reciprocal process, according to a new model of cortical development.

By Holly Barker
30 July 2026 | 5 min read