Nostalgic for the nostalgia of yesterday? Popular Science had a thriving enterprise in the 1930s that looked back at wacky inventions from earlier years.
One mine in 1919 South Africa had a foolproof way to see whether its miners were smuggling out raw diamonds: it gave them a radiation-laden scan at the end of every shift.
Forget cellphones. The real danger from distracted driving is the car radio—according to observers in the days before Sirius, in-car DVD players, and even web browsers.
The traffic safety department is trying to get the nation used to today's silent cars. Something similar happened at the beginning of the 20th century.