Given no interference, how long would an elephant orbit a black hole with a mass 50x10^30 kg given a starting distance of 500,000 kilometres from the centre and a velocity of 800km/h tangent to the black hole?
If an airship inflated with 50 cubic metres of helium materialised on the abyssal plain, how long would it take for every helium atom to have reached the surface by any means?
If a jarrah tree weighing 5 metric tons falls in a forest, what is the ecological loss or gain in terms of probability of threatened species survival in that forest?