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Too much ice (at the wrong time) can be a bad thing
Penguins die in 'catastrophic' Antarctic breeding season
All but two Adelie penguin chicks have starved to death in their east Antarctic colony, in a breeding season described as "catastrophic" by experts.
It was caused by unusually high amounts of ice late in the season, meaning adults had to travel further for food.
It is the second bad season in five years after no chicks survived in 2015.
http://www.bbc.com/news/science-environment-41608722