Jetting from London to Houston, with noise cancelling headphones isolating me from both a snoring neighbour and the rumble of our propulsion, I imagined a Bantu throwing a spear at a stork. I also wondered what it was like in 1822 when no one could imagine a White Stork making an annual round trip after breeding in Germany, going south of the equator in East Africa to avoid European winters. At that stage in our understanding, the ancient Greek idea that birds turned into fish for the winter was still popular.
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