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Conch shells hold the secret to impact-resistant armor
[embedded content] Conch shells have a complex, three-tiered structure with a zigzag matrix that makes them resistant to breakage. Small cracks don’t typically lead to big ones, since they have to go through a maze to become bigger. However, to be able to replicate that quality, scientists need more data on how exactly cracks appear and spread. That’s why the team used the samples they printed to perform a series of drop tests. Since these samples are identical, unlike conch shells that have variations in quality, they gave the scientists a way to collect more accurate data. By the end of the testing period, the researchers were able to conclude that the shell’s structure is 85 percent better at preventing cracks than the strongest base material and 70 percent better than a traditional fiber composite arrangement. The material, the researchers find, is perfect for impact-resistant gear, since it’s capable of resisting damage and dissipating energy before it hits your body. Team mem...
EPA pulls climate science web pages to reflect White House views
The Washington Post notes that the EPA has pulled a nearly 20-year-old page explaining the fundamentals of climate change and how it affects the US. While updates to the site were frozen and closely scrutinized under President George W. Bush’s administration, his White House was still content to leave the page running — clearly, even that was too much under the new presidency. The EPA stresses that it will use “proper archiving procedures” to preserve the previous version of its website. That information won’t disappear if you’re really looking for it. However, the very fact that it’s going away from the current site is problematic. While the EPA website is bound to reflect administration policies, the basic climate science content was a valuable source of information for students and anyone else who needs to know how climate change works . Curious minds will have to turn to the archives or third-party sources to get the facts. And of course, it’s hard to escape the irony of an envi...
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