Environment Finding California’s Climate Past and Future Inside of Its Trees In order to better understand just how extreme the state's weather has gotten, scientists looked to the ring patterns of 500-year-old oaks. Daniel Ackerman
Environment We’re Having Our Hottest Summers Since Before the Roman Empire A new study puts recent European summer heatwaves in ancient context. Nathan Collins
Environment Lord of the Tree Rings Benjamin Cook looks at ancient trees to forecast future droughts. His latest findings are not good news for the West. Alisa Opar