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.
They do have home territories, but they will not stay in one particular tree. The koala is an arboreal animal. Arboreal means âliving in treesâ. Koalas live, eat, and sleep in the top branches of eucalyptus trees, also known as gum trees. Males koalas have a special area on their chest that leaves a scent. They rub their chests on their âhome treesâ to leave their scent and mark the trees as their own.