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The US army wants invisibility cloaks within 18 months

The US Army has put out a call for proposals from companies for wearable camouflage that has the ability to shift its colour according to the background, making the wearer invisible. It wants to test the best designs in just 18 months.

That doesn’t seem far away at all, but actually we’re closer to that kind of technology that most people realise. Metamaterials that can bend light around an object were first demonstrated nine years ago, and since then many researchers have showed off their own invisibility cloak designs.

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Why are black cats considered unlucky?

Everyone knows that when a black cat crosses your path bad luck is sure to follow, but have you ever wondered how black cats got their dark reputation? Is it simply due to the color of their coat, or something more sinister?

Thousands of years ago, cats of all colors enjoyed the good life in ancient Egypt, where killing a cat came with a swift death sentence. A few millennia later, Christianity spread throughout Europe by overthrowing local pagan customs and traditions.

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42% of people using dating app Tinder already have a partner, claims report

Tinder shot to fame as a dating app for tech-savvy single people. Except, as it turns out, a big chunk of its users may not be single after all.

That’s according to research firm GlobalWebIndex (GWI), which released some figures on Tinder from its latest survey of more than 47,000 internet users around the world that suggest the app has a wider demographic.

In fact, the research claims that 30% of Tinder users surveyed are married, while another 12% are in a relationship. 54% classed themselves as single, while 3% were divorced or widowed.

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