Oops! Something went wrong, please try again later.
Angkor, archaeological site in what is now northwestern Cambodia, lying 4 miles (6 km) north of the modern town of SiÄ•mréab. It was the capital of the Khmer …
By chance, Alfred Nobel discovered that nitroglycerin was absorbed to dryness by kieselguhr, a porous siliceous earth, and the resulting mixture was much safer to use and easier...
Save
Share
More