Wisner,+Derek

I read the article about lead poisoning, and was very surprised to find out how dangerous and widespread the problem really is. I already knew that lead is in many kinds of old paint, but I had no idea it was found it other things, like candy. Since some types of lead actually taste sweet, when lead was getting into the candy, no one could really tell. I think it is crazy that anyone could allow lead to get into candy without realizing it or doing anything about it. It is extremely dangerous and could cause many problems in the future for people who consumed that candy. Although the lead poisoned-candy was not a widespread problem, and was only found in candy-making plants in Mexico, it is still something everyone should watch out for to ensure any type of food they make is 100% safe.

Derek, Well done! Always good to be cautious. I think I'll avoid mexican candies. :) MW

I think it is interesting that the kilogram is the only standard unit that is still defined by a man-made piece of metal. Since everything else is based on a physical property found in nature, I would think it would be the same for the kilogram. I think it is good for all standards to be found in nature, but it seems a little ridiculous that there is so much debate and nit-picking over what the "new kilogram" should be. It doesn't seem like it should be that big of deal, since a kilogram has been defined the way it is for so long with no problems. I don't think it should be as hard as it is for scientists to agree on a way to define the kilogram, but I guess it is a bigger deal to them than the average person.

Derek, Scientists are no different than other people in that they often disagree. I guess we will find out soon if they come to a consensus on the definition. 5 stars. MW

I found the article on motion sensors pretty interesting. I never knew there were different kinds of motion detectors that are each better for certain specific uses than others. I never really thought about motion detectors or that there would be situations where some would be ineffective, but it does make sense. I also think it's pretty cool that the "technology" in motion detectors actually comes from animals in nature, like bats and rattlesnakes. It seems like lots of technology like this was actually found in nature first. The different types of motion sensors all work in unique ways to achieve the same purpose, which I find very interesting.

Derek, A great deal of what we call science and technology has been taken from careful observations of nature! 5 stars. MW