In its 177-year-long existence, scientists find the world's largest waterlily. Even though the huge plant was in the records of the Royal Botanic Gardens, Kew, and grew in many water collections, it was wrongly thought to be a different species. A thorough scientific analysis has confirmed that this is a discovery. Aside from being the tallest water lily, its leaves may span more than 3 meters (10 feet), making it the biggest in the world.