Two penguins bitten to death at Emmen zoo, culprit unknown / 3 penguin chicks born to 2 pairs, city zoo popln now 21 / Glasgow penguins protest Donald Trump's tariffs on penguin-only island / Penguin nesting season begins at Chicago aquarium / Penguins targeted by Trump tariffs now have a (viral) social media account / Donald Trump imposes trade tariffs on islands where penguins live but no humans / The price Libby Kennedy pays for working with penguins - she has to pick up their poo / Nature: Penguins in Antarctica / Daily briefing: A solar eclipse, courageous penguins and volcanic smoke rings: the best science images of the year / Human intrusions ruffle the feathers of even the boldest penguins