El Niño

In dry years, rivers become birds’ crowded corridors

New research finds that in dry years, birds funnel into the greenness of river environments, but overcrowding may increase competition for habitat and resources.


EXPECTING THE UNEXPECTED IN CLIMATE CHANGE

Studying polar ice and tropical glacier ice samples, Lonnie Thompson and his team reconstruct climate and environmental histories going back 25,000 years – findings they say may help explain devastating population disruptions throughout history.