In this issue

Two Washington University scientists are reconstructing past climate and cultural shifts in the Peruvian Andes. Today, such high-altitude parts of the tropics are warming faster than the rest of the globe. What Bronwen Konecky and Sarah Baitzel discover could help predict how this delicate ecosystem might be affected in the future.

The effects of climate change cannot be handled piecemeal, argues Derek Hoeferlin. Managing 21st-century waterways will require coordination on a continental scale — and a foundational understanding of how water shapes our environment.

The university develops a new “curriculum” to help members of our community cope during the pandemic.