Tom Scott
After 140 years, this old technology still keeps trains safe
S12 • E10 Mar 7, 2022 7m
"Anderson's Piano" is a set of wires and signals at the Pass of Brander, near Falls of Cruachan in Scotland, that try to detect when there might be a boulder on the track. They're 140 years old, and so far no-one's been able to find a better solution - but they're working on it.
