PLEASE NOTE:  

Parking and road access will be limited during the Ann Arbor Art Fair (July 17–19, 2025). We recommend taking the Art Fair shuttle if possible.

Variations in atmospheric oxygen levels shaped Earth’s climate through the ages

"The connection between oxygen levels and climate has never been considered. It turns out that it's an important factor over geological timescales," said Poulsen
by Jim Erickson

See the Michigan News story here.