Thylacines were not related to kangaroos beyond being marsupials. Thylacines, or Tasmanian Tigers, were dasyurids, or carnivorous marsupials while kangaroos are herbivorous macropods (big-footed marsupials).
about as big as a bread box
The length of your jaw
They don't. Thylacines are extinct. Prior to their extinction, Thylacines (also known as Tasmanian tigers) lived in grasslands and bushland of Tasmania. There is also fossil evidence indicating that they lived on the Australian mainland.
The mandible is your jaw bone. So putting your hand on your jaw tells you the size.
Anthony malones jaw is 55 squre metres long
A Big Mac!
The molars are the big teeth at the back of the jaw. They are named after millstones and come from the Latin term.
Big enough to eat the things it does.
2 ft
4 tons
Supposedly extinct. But reports of thylacines still come in from time to time, as does some interesting videos. However, none of these have been verified.