A Special Sleeping Pill Sleeping problems are common nowadays. Many people use sleeping pills (安眠药) to get enough sleep. But they can be bad for our health. Here's a "pill" that sends out little electronic pulses (电子脉冲) . It's not a pill but a small tool. It can relax your brain. If you hold it in your hand, you will feel relaxed and fall asleep quickly. ____ Melanin (黑色素) in our body gives color to the hair, skin (皮肤) and eyes, and it naturally protects (保护) the skin from sunshine. Scientists recently made a special kind of melanin cream. They tested it on people's injured skin. They found that the cream could help the skin stay the same as before. The cream only sits on the skin once it's put on, so it's very safe to use. Taking Pictures on the Moon Scientists from NASA and the European Space Agency (ESA) made a new camera for astronauts, which could be used to take photos on the moon. It's very sensitive (敏感的) to light, so it can take pictures in the dark environment of space. It can also work in both hot and cold environments of the moon from -200℃ to 120℃. The camera was so special that astronauts wearing space suits could easily use it. |