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June Astronomical Highlights: The Beehive Cluster and Blue Clouds
By Kelly Kizer Whitt Although June is the month with the least amount of darkness, for many, stargazing ramps up this month. It's finally warm enough in much of the U.S. to lounge outside, even at...
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Trump's BLM Ready to Sacrifice Ancient Rock Art for Gas Drilling
By Sam Schipani While the Ancestral Puebloan people of the Southwest were building citadels like Chaco Canyon , the Fremont people were carving mysterious petroglyphs depicting horned,...
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Air Pollution Linked to Genetic Changes in the Brain
By Jason DaleyThere's little question that air pollution is toxic for the human body. Studies have shown that particulate matter in the air can lead to lung disease, heart disease, strokes, and lung...
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High Seas Fishing as Economically Unsustainable as It Is Ecologically
By Carly Nairn Five countries are responsible for the majority of fishing in the high seas—international waters that are not under one country's jurisdiction. All five depend on enormous subsidies to...
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The Captivating Venus Flytrap
By Matt SmithIt's late spring, and the Venus flytraps are blooming in the marshy countryside near the Carolina coast, their white flowers jutting far above the plants' business ends.Their vividly pink...
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Coral Reefs Lost to Kīlauea Eruption
By Dan ZukowskiWhen searing black lava from fissure 8 slid into the Pacific Ocean at Kapoho Bay on June 3, it had been five weeks since the collapse of the Pu'u 'Ō'ō crater, along the eastern rift...
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America’s Most Obscure Desert Is in Alaska
By Michael EngelhardTime slipping, a tabula rasa. Footprints erased, slopes advanced, ripples unsculpted. A whole world recast by whims of weather. Besides snowfields and foreshores, few landscapes...
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The Lake Powell Pipeline Is a Hot, Expensive Mess
By Sam SchipaniWith rainfall at record lows, water is an increasingly precious commodity in the deserts of southern Utah. But in the driest reaches of redrock country, one long-waged water war...
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Food's Environmental Impact Varies Greatly Between Producers
By Jason DaleyThere's no way around it—everything in the grocery store, from nuts and kale to beef and apples, has an environmental impact. Fertilizer causes water pollution, farm fields can encroach...
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Breaking: Sierra Club Demands Pruitt’s Emails After Only 1 Disclosed by EPA
As part of ongoing litigation, the Sierra Club has demanded that the U.S. Environmental Protection Agency (EPA) search Scott Pruitt's personal email accounts for work-related emails, or certify...
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Can Reflective Roofing Save Energy and Help the Environment?
By Bob SchildgenHey Mr. Green,I liked your article about the amount of space needed to provide solar power in the United States. I have wondered how many roofs would have to be painted white to...
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'Extinct' San Quintín Kangaroo Rat Still Exists
By Carly NairnAt dusk, San Diego Natural History Museum mammalogist Scott Tremor set up a few live traps in some abandoned agricultural fields in Baja California, Mexico. With Sula Vanderplank, a...
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A Coder and a YouTuber Provide DIY Power for Puerto Rico
By Tom CassauwersBefore the hurricane came, I was a software engineer. I'd graduated with a bachelor's degree in graphic design and animation, but here in Puerto Rico there weren't many jobs in that...
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July Astronomical Highlights: Five Planets and a Micromoon
By Kelly Kizer WhittKnown since ancient times, Mercury, Venus, Mars, Jupiter and Saturn can normally all be seen with the naked eye. Greeks called them "wandering stars" or "asteres planetai." This...
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Float On This Season With 9 Paddling Must-Haves
By Conor MihellAfter nearly 20 years of venturing in canoes and kayaks down wild rivers and along all three of North America's seacoasts, plus guiding multiday tours on the Great Lakes, I have...
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What Can Dockless Bikes Tell Us About Cities?
By Enrique Gili This past spring, clusters of brightly colored dockless shared bikes (DSBs) began to proliferate on San Diego's city sidewalks like tulips after a spring rain. They were put there by...
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6 Things You Can Do Right Now to Help Stop Trump’s Supreme Court Nominee
By Courtney HightDonald Trump announced that he will be nominating another extremist judge to the Supreme Court—Brett Kavanaugh. If the Senate lets Trump successfully install Kavanaugh to fill this...
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300+ Mammal Species Could Still Be Discovered, Scientists Say
By Sara NovakYou can't protect an animal that you don't know exists. Tapanuli orangutans, for example, are found only in the Tapanuli region of Sumatra; they were only identified as a species last...
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Night-Hiking With the San Luis Valley's Bachelor Bats
By Stacey McKennaI'm sitting on a ridge at 9,000 feet, overlooking the world's largest alpine valley. The mid-June sun drops behind a nearby cliff band and the clouds shift, leaving errant rays of...
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Henry Coe State Park Is the Bay Area’s Best-Kept Backpacking Secret
By Jason MarkNormally, a writer writes to reach an audience. But what I'm about to tell you, I want you to keep just between us, OK? Whatever you do, don't email this article to your friends, don't...
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Antibiotic-Resistant Genes Are Airborne, Exposing Millions
By Jonathan HahnIn 1991, the Bay Area Air Quality Management District launched a Spare the Air program to keep residents in the San Francisco Bay Area informed of high ozone-level days, when air is...
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August Astronomical Highlights: Summer’s Best Meteor Shower
By Kelly Kizer WhittAugust is the time to sit back, relax and enjoy the free show overhead. The Perseid meteor shower is one of the most prolific annual meteor showers and the only one that occurs in...
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A Toxin in Every Household
By Alison CagleWhen was the last time you looked around your kitchen or bathroom for chemicals that are toxic to your health? In many households, those chemicals don't just come in the form of liquid...
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Climate Defenders Mobilizing for 3rd People’s Climate March
By Alison CagleCall it the "People's Climate March, Part III." On Saturday, Sept. 8, thousands of people are expected to converge on the streets of San Francisco to demand that government leaders...
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The One Thing Better Than Summer Skiing
By Aaron Teasdale"There's snow up here, I promise," I assure my son Jonah, as we grunt up a south-facing mountainside in Glacier National Park in July. A mountain goat cocks its head as if to say,...
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The Top 20 Coolest Schools 2018
By Katie O'ReillyIn the 12 years since Sierra began highlighting the best environmental practices of colleges and universities, the competition to be the ecofriendliest in all of academia has gotten...
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Barbed Wire and Redrock at Bears Ears National Monument
By David GessnerI am sitting near the top of the eastern ear, or rather the eastern earlobe, of Bears Ears, the redock buttes that give our most controversial national monument its name. From up here...
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6 of the Best 2018 EVS, Both Full Battery Electric and Plug-In Hybrid
By Jim Motavalli The future of the auto industry is increasingly likely to be electric—although you wouldn't necessarily know that from sales numbers. Just under 200,000 plug-in cars were sold in the...
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September Astronomical Highlights: Andromeda Galaxy and a Comet
By Kelly Kizer Whitt Relief from the heat of summer and long days baking in the sun is on its way. The Northern Hemisphere's fall equinox occurs on Sept. 22 at 6:54 P.M. PDT. The harvest moon—the full...
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'Eating Animals' Drives Home Where Our Food Really Comes From
It started with a call from actress and animal rights activist Natalie Portman to author Jonathan Safran Foer. The latter had recently taken a break from novel-writing to publish 2009's New York Times...
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