Hunter,+Daniel

Artificial Blood 1 Finding artificial substitutes for blood has been tested and experimented with since the beginning of the 20th century. Scientists plan on creating this artificial blood by using hemoglobin, the proteins that bond with oxygen in blood. Scientists figure that this would be helpful because not as much donor blood is needed and donor blood is only usable for 28 days as opposed to artificial blood that has the capability to last a lot longer. Although scientists have experimented with artificial blood, there have been many failures and complications with their experiments. Someday soon scientists hope to have artificial blood created.

Dan, Looks good. Let's hope they are successful soon! 5 stars. MW

Redefining the Kilogram  There are seven base units in the SI system. Among these are meters, seconds, amperes, kelvins, moles, candela, and the kilogram. There is a perfect standard of each of the units. The official standard for a kilogram is kept under lock and key at the Bureau of Weights & Measures in Paris, France. The kilogram is made out of special materials that disable it to change form or weight in any way. This is important because it is the most accurate kilogram in the world. There are may prototypes that circulate amongst the scientific community to make sure that they have a more accurate and precise method of weighing things they use in experiments. The BIPM takes measurements and standards seriously with good reason. Without accurate weights most scientific data would vary throughout the world.

Dan, Yes but the interesting thing is that the standard has lost some weight. I wonder what they compare it to to see that? Could it be that the scale they use was really the point of error? 5 stars. MW

Motion Detectors I never really took the time to think about how simple things, such as motion detectors, work. Motion sensors use light, sound, and infrared beams to operate properly. We use motion sensors all the time because it is a form of luxury when the sensor can detect you and open a door or turn on a light. The situations listed on the back are what really showed me how much motion detecting is used in every day life. I didn't know that temperature could be used when detecting motion. However, I have seen IR being used before in unmanned planes and in warfare. Einstein, Heinrich Hertz, and other scientists that have contributed to the development of motion detecting should be greatly appreciated for providing this generation with the luxury of motion sensors.

Dan, Yes I imagine it caused quite a stir when they first installed automatic door openers. I bet they are still pretty expensive and probably need maintained and fixed frequently. Good thoughts! 5 stars. MW