In the scheme of things, a freak lightning storm near the North Pole probably isn’t the biggest concern about the rapidly warming Arctic. But it’s yet another sign that the Arctic continues to have an abnormal one this summer. Continue reading Lightning Struck Near the North Pole as the Arctic Continues to Unravel
The Congo Basin is the second-largest rainforest on Earth, and like most tropical forests, it’s getting chewed up by humans. That’s a problem for the climate, and not just because trees are a natural sponge helping to mop up humanity’s ever-rising carbon emissions. New research suggests that as trees are replaced with fields for agriculture, carbon that’s been locked up in the Congo’s soils for hundreds to thousands of years is starting to seep out. Continue reading The World’s Second-Largest Rainforest Is Losing the Carbon It’s Held for a Thousand Years
Hundreds of millions of years ago, massive ice caps sheathed Earth’s continents from coast to coast. Only the peaks of the planet’s mountains stood above the ice as glaciers ground and crushed their way through the bedrock, meandering slowly toward the snow-covered plains. Where the glaciers met the oceans, huge blocks of ice and rock calved from the glaciers and dropped into the sea. Life, mostly algae, cyanobacteria and other bacteria, somehow persisted in the small ice-free pockets of ocean water. Like an icy planet in a distant solar system, Earth during its formative years, a juvenile phase known as the “Snowball” Earth, was a far different place than the mostly blue planet of today. Continue reading How Does Earth’s Carbon Cycle Work?
Alaska in March is supposed to be cold. Along the north and west coasts, the ocean should be frozen farther than the eye can see. In the state’s interior, rivers should be locked in ice so thick that they double as roads for snowmobiles and trucks. And where I live, near Anchorage in south-central Alaska, the snowpack should be deep enough to support skiing for weeks to come. But this year, a record-breaking heatwave upended norms and had us basking in comfortable—but often unsettling—warmth. Continue reading Record-Breaking Heat in Alaska Wreaks Havoc on Communities and Ecosystems
Neil Pederson’s introduction to tree rings came from a “sweet and kindly” college instructor, who nevertheless was “one of the most boring professors I’d ever experienced,” Pederson said. “I swore tree rings off then and there.” But they kept coming back to haunt him. Continue reading Tree rings contain secrets from the forest
After nearly two months, the largest wildfire in California history has finally been put out. The Ranch Fire can now officially take its place in the record books, having burned a grand total of 459, 123 acres. Continue reading The Largest Wildfire in California’s History Is Finally Out
The Amazon and the adjacent Andean slopes in South America host an astonishing richness of plants and animals. These species have been sources of food, shelter and medicine since the arrival of humans and a target of scientific curiosity since the days of the earliest European naturalist explorers.