This week: plummeting bird populations; the global climate strike; whether blood-letting benefits high blood pressure; why vaseline won't melt in the microwave; how pilots land planes even though the Earth is spinning; how birds pattern their plumage; why your nose runs when you wake up; what causes morning breath, and why would a car use more fuel driving a journey on the outward leg compared with the return journey? Join Dr Chris and 567 Cape Talk's Kieno Kammies as we Ask! the Naked Scientists... Like this podcast? Please help us by supporting the Naked Scientists