When Leigh Love stumbled upon a bird's leg bone at the Waipara Greensand fossil site in New Zealand's South Island in 2018, he suspected that they might be those of an ancient penguin. With four other species discovered there, the area has been a hotbed for penguin remains from the Paleocene Epoch, which spanned between 66 million and 55 million years ago. What the amateur paleontologist did not realize was that the fossil belonged to the largest, hitherto unknown, penguin species ever found.