The Magazine of The Sierra Club
In Deep Water
Photographer Paul Souder's award-winning photograph of a polar bear in Hudson Bay
In this story:
wildlife
Lands & Waters
June Observing Highlights: The Ring Nebula and Rare Electric-Blue Clouds
Darkness is elusive this month, but there are still interesting things to see up high
In this story:
science
Hummingbirds March North, Fueled by Sugar Water
Citizen science data reveals the tiny birds' feeder frenzy
Pondering Cranes With EarthWatch
A journey into the Aransas National Wildlife Refuge to track the whooping crane
Sailing Aboard a Historic Maine Windjammer
One writer’s wind-powered exploration of Penobscot Bay
Border Walls Are Good at Keeping Out Everything But Humans
A "Bioscience" report documents the danger of border walls to wildlife
What to Expect When You're Expecting an Eclipse
An astronomer has prepared for this August’s total solar eclipse since he was 11
Bad Dog
A new study examines the wildlife impacts of free-range canines
Searching for the Meaning of Wilderness in Utah's Big, Open Desert
An excerpt from "Open Midnight: Where Ancestors and Wilderness Meet"
I Used to Judge Citizen Scientists. Now I Am One.
In the Cayman Islands, amateurs play a big role in measuring coral-reef health
