Keith Kloor

Collide-a-Scape

Twiggers

alaska-tundra

Learn about hotspots in tundras and boreal forests that are releasing higher level of carbon dioxide,  altering the carbon balance in the world's coldest regions.

Permafrost Thaw and Wildfires Are Raising CO2 Emissions in Arctic Tundras

Taken from a tree in Norway, this stained tree sample shows a blue ring from 1902. (Credit: Pawel Matulewski and Liliana Siekacz)

Blue rings in trees and shrubs

Learn more about these signs of summertime cold, perhaps tied to volcanic activity in 1877 and 1902.

Volcanic Blasts May Be to Blame for Strange Blue Rings in Norway’s Trees

NASA’s Aqua satellite captured this view of the Palisades Fire blazing on the afternoon of the day it erupted, Jan. 7, 2025. (Credit: NASA Earth Observatory)

Palisades Fire

Here's what the cataclysmic situation looks like from space.

L.A. Firestorms Have Already Burned an Area Nearly Twice as Large as Manhattan

Grass-covered mounds mark the site of the Roman-era lead mine at Charterhouse on Mendip in the United Kingdom (Credit: Andrew Wilson)


Roman Era Mine

Learn how researchers examined lead levels in ice cores dating back to the Roman Empire, and found concentrations high enough to affect IQs.

Ancient Lead Poisoning May Have Contributed to the Roman Empire’s Downfall  

A study led by Dartmouth researchers shows that microscopic marine animals called zooplankton (pictured) can be enticed to ingest organic carbon particulates in seawater that are later confined to the deep ocean in the animals' feces. The researchers found that clay sprayed on the water's surface bonds with the carbon, creating sticky balls that become part of the ravenous little creatures' daily smorgasbord. (Credit: Mukul Sharma/Dartmouth)


carbon capturers

Leveraging the food of tiny phytoplankton could trap carbon and sequester it to the ocean’s bottom.

Poop of the Ocean’s Tiniest Organisms Could Combat Climate Change

fire

Windblown embers can trigger spot fires much further away than expected. Now a new mathematical model of the way the wind interacts with firebrands explains why. 

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