June 24, 2020

Not a Mad Lib! Our blogger lays out some of the evidence for and against the notion that volcanic eruptions can trigger El Niño. 

close up photo of a cross-section of a tree, showing growth rings
November 29, 2018

Tree rings can reveal the age of wood used to make human artifacts from famous violins to the cliff ruins of Mesa Verde, and also tell us about the climate conditions that prevailed when those trees were alive. 

This static graph of changes in CO2 concentrations goes back 400,000 years, showing the dramatic spike in recent years.

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