To protect the trees from attack by the mountain pine beetle. The little bags contain verbenone, a chemical normally released by beetles as they lay their eggs just under the bark of a pine tree,...
With mercuric chloride, also known as 鈥渃orrosive sublimate.鈥� People have been intrigued by mercury and its compounds for over 3500 years. Ko Hung, an ancient Chinese alchemist was one of the first...
Why is it that in hot countries we put salt on ice in the ice cream makers to keep the ice from melting, while in cold countries we put salt on ice to melt it? In both cases, the answer is based on...
A friend of mine is very much opposed to using a plastic kettle, for fear of 聽some of the toxins leaching into the water.聽 He therefore will use only a metal kettle.聽 Is there any basis for this?...
