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Camouflage has been part of military strategy for millennia. It allows soldiers to hide in plain sight and attack without being seen. But a little over 20 years ago, the U.S. changed its military camouflage and everyone realized pretty quickly that it was a big mistake.

Spiders are some of the smallest invertebrates on Earth, but these tiny creatures have a remarkable skill. They can see better than most animals 10 times their size. The trick is that their eyes are tiny little telescopes that allow them to focus on things in extraordinary detail. Some scientists even claim spiders can see the details of the moon. The real question is, why do they need to be able to do this?

Most of us know someone or are someone who occasionally gets up in the middle of the night while they are sleeping and walks around the house or does something strange. This is called sleepwalking, and around 4% of US adults have reported this happening to them. But why does this happen, and what can we do to prevent it?

Back in 2019, a marathon runner named Ediud Kipchoge accomplished something no one had before: He ran a marathon in under 2 hours. He did this wearing brand-new shoes designed by Nike. His incredible feat was immediately called into question, with critics claiming his shoes gave him an advantage. But they’re just shoes, right? How much impact can they really have? As it turns out, a lot.

Do you have memories of snapping together Lego bricks to make something special? Most of us think fondly of those plastic pieces. (Unless, of course, you stepped on one.) While the company has a wholesome image, it hasn’t always been that way. The real history of Legos is a lot darker than most people realize.