Artificial light is upending trees’ ability to use the natural day-night cycle as a signal of seasonal change.

Trees and shrubs in cold-weather climates rely on certain signals, such as temperature and light, to know when to leaf out and bloom. Climate change is scrambling those signals.

COVID-19 kept many scientists from doing field research in 2020, which means that important records will have data gaps. But volunteers are helping to plug some of those holes.

New research on marmots in the US reveals how the topsy-turvy seasons are causing havoc among wildlife.

The COVID-19 pandemic is interrupting scientific field work across North America, leaving blank spots in important data sets and making it harder to track ecological change.