Penguins are objectively adorable animals. The flappy little buddies waddle around on stubby feet, and some even like to be tickled. Their chicks are basically cute fluffballs made of fat and charisma that dance in children's movies. However, a new fossil discovery in New Zealand has revealed an ancestral penguin species that was considerably more intimidating than today's agreeable Antarctic chaps. This long-extinct penguin was immense - standing 1.77m tall and weighing 101kg - one of the largest semi-aquatic birds to ever shuffle across the Earth.