A new Oxford study shows that Antarctic penguins have brought their breeding season forward two weeks in response to climate change. These changes threaten to disrupt penguins’ access to food and increase interspecies competition. Penguins play a key role in Antarctic food chains, and losing penguin diversity increases the risk of broad ecosystem collapse. Researchers from Oxford and Oxford Brookes University studied three species of penguins over 10 years from 2012 to 2022, specifically their ‘