Rusty mix •

And amazing as it may sound, they settled on a mixture of rust and oil. Now this didn’t leave the barns the striking red that we’re used to seeing. Nope, it tinted them in a kind of dark orange. The rust, or ferrous oxide to get technical, proved a good agent for tinting the “paint” and didn’t cost much. Photo Credit: Stritter/ullstein bild via Getty Images

News coming your way
The biggest news about our planet delivered to you each day