Stephen explains why a human on a bicycle is the most energy-efficient invention ever, challenging common perceptions about technology.
As heard by us
Coal is treated as a practical force behind Hong Kong's growth, transport, and daily movement.
Coal runs through the episode as a working material behind Hong Kong's early growth, from late 19th century building work to transport and daily movement.
Why you'd press play
Coal powers the background of Hong Kong here: buildings, rail links, road building, and the small steam craft that kept the city moving before 1945.
Listen to the show on