Clothes really do come back in style every 20 years

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Clothing trends come and go, but in some cases, they don’t stay away for too long. For decades, both the fashion industry and its devotees have referenced the so-called “20-year-rule,” which suggests society is liable to see certain styles…

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World’s largest steam locomotive heads out on tour

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. The world’s largest operating steam locomotive is hitting the road—or tracks. Union Pacific’s Big Boy No. 4014 is heading out on its first coast-to-coast steam tour to celebrate the United States’ 250th anniversary. The first leg begins on March…

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