This Lego Nyan Cat Is Mechanically Animated And Infinitely Cool
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Yes, we can. We can totally create the artificial gravity seen in movies like 2001. A Space Odyssey or Elysium, it will just cost a lot of freaking money and require a lot of freaking resources. Real Engineering explains how centrifugal force works as artificial gravity and estimates (using maths cribbed from how much the ISS costs) the cost needed to build it. only around five trillion dollars and 10 years of the world's total aluminium production. And that's just for starters.
Good kitchen knives are expensive. A top of the line Shun, for instance, can cost as much as $US750 ($1,008). But one knife enthusiast promises to offer the same great quality knife for a fraction of the price. So I got a chef to try out the prototype.
Hand sanitiser is a constant presence in modern life, from your purse to your office desk to the automatic dispensers in airports and classrooms. Now the US Food and Drug Administration says that it's looking for data on the safety and efficacy of these products.