2025 Summer
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Current Issue: 2026 Spring
From Drought to Deluge: What the LA Fires and Hurricane Helene Have in Common
It all comes down to physics
June 9, 2025
"Seedlings" is Sierra's first-ever issue for young readers
June 9, 2025
In New York, high schoolers head to the statehouse to speak truth to power, getting a hands-on lesson in how hard that can be
June 2, 2025
Fifth graders rally to keep oil drilling away from a beloved waterway
July 4, 2025
Can microscopic creatures help get rid of humanity’s huge pile of plastic?
July 13, 2025
Beyond the ick factor, freeloading creatures are essential—and some species are in trouble
June 23, 2025
A disappointing fishing trip inspired him to start the Eagle Reef project
June 10, 2025