A fundamental constant is one that has to be measured by experiment, rather than being derived from any other quantities. Which values we choose to make fundamental and which ones are derived are somewhat arbitrary.
Koalas are native to southeastern and eastern Australia, living in forests of eucalyptus trees. They are basically sedentary animals that need to sleep a lot to give them time to digest their food. Being on the ground all the time would be a disadvantage, because predators could catch them easily.
History for koala. The word koala was taken from a language called Dharuk, spoken by the native Australian people who lived around what is today Sydney, Australia, when the first Europeans landed there in 1788. The word was first written koolah, which was probably closer to the way it was pronounced in Dharuk.