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Stories about: clay


Dirt against Poison

Most plants are loaded with compounds generically called secondary metabolites that act as a defense method for them in that they are toxic for animals. Caffeine is such an example. Many plants we eat may be loaded with toxins, except for the parts we actually consume, like is the case of the potato or tomato. Nevert...

24 April 2008
03:28 GMT

Dry Lake Bed Found on Mars

It's no secret now, Mars is thought to have been much hotter in its past, basically meaning that it could also have had liquid water on its surface at some point in time. NASA's Mars Reconnaissance Orbiter and ESA's Mars Express routinely return evidence of what seems to be gullies or lake beds possibl...

7 March 2008
04:33 GMT

Deep Mystery: How Can French Clay Kill Flesh-eating Bacteria?

When the Buruli ulcer, nasty flesh-eating eruptions of Mycobacterium ulcerans, broke out in Ivory Coast a decade ago, two French green clays worked best, removing the specter of surgery or amputation. One clay induced excruciating pain, but in several days it induced skin tissue regeneration on the open wound. A seco...

20 November 2007
04:20 GMT

How Did Stone Age People Invent the Pottery?

Surely, the first pottery product was not the work of a sole person but the result of experience accumulated over generations, after countless trials, failures and discoveries. The pottery appeared during the Neolithic ("The last stone age"). Till then, the pots were made of stone and wood. Ceramic appeared 8,000 yea...

22 March 2007
11:56 GMT




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