The team had to bring the core samples—dozens of cylinders of ice about 50 centimeters (20 inches) long—to the surface carefully. They then numbered and packed the samples so they could be carried ...

To the editor — The temperature data estimated from the Vostok ice core samples has been manipulated by several people to falsely blame humans and greenhouse gases for increasing temperatures. If you ...

An ice-core record of hydrogen reveals that atmospheric levels vary in response to climate change and have increased drastically owing to human activity since the pre-industrial era. The apparent ...