Researchers say only two female Asiatic cheetahs are alive in the wild in Iran, which hosts this beautiful animal. Asiatic cheetahs, also known as Iranian cheetahs, are the fastest animals on earth and classified as endangered animal with fewer than 47 believed to be alive in Iran. As part of efforts to increase the animal’s profile, in the past ten years cheetahs’ pictures have been displayed on the national football team’s T-shirt. In the past 15 years, 48 cheetahs are believed to have died, seven from natural causes, 21 at the hands of farmers, 15 in car accidents and five by hunters. Of the two female cheetahs believed to be still alive, one is in Tooran national park and the other one in the nearby Miandasht plain.

The moon and the stars are not the only objects shining in the sky. There are also planets. The sun has nine planets going around it. We live on one of these, the third planet from the sun, Earth. The Earth moves around the sun once every year. It's about 150 million kilometers away from the sun. The planets that are nearer to the sun takes less than a year to go round the sun once. Mercury is the closest to the sun, just 58 million kilometers away. Then comes venus. Planets that are father away from the sun take more than a year to orbit the sun. The most distant planet is pluto. It takes over 247 years to go round the sun.Planets don't send their own heat or light like the sun. They shine in the sky only because the sun shines on them. They reflect the sun's light just like the moon does. The planets nearest to the sun are too hot to live on, while those farthest away are too cold. Living things would not be able to live on these planets.The biggest planet by far is Jupiter. The most beautiful is Saturn, the sixth planet from the sun. Its beauty comes from the rings around it.

I’m Karoon River. I’m very old. I help people stay alive. They use my water for farming and drinking. Also, I’m the home of many fish and birds. Nowadays, I feel sick because some people are polluting and destroying me. Some careless and selfish people are dropping trash into me. They are hurting me. They are hurting my beautiful birds and animals. I need your help now. Please take some actions to save me. You can make a movie about me and teach people how to take care of me. You can talk to other students at school. They are kind and helpful. They can talk to their friends and families then. If you work together, you can stop people and factories from hurting me. You can tell them that I’m not a trash can. If you take care of me, I will hopefully become clean and healthy again. If you help me, I won’t die. Please help me! Please!

More than half of the blood is plasma. This is a clear, yellow liquid, which carries all the blood cells and chemicals such as hormones and glucose. It is good to know What do they do? The answer is: Red blood cells carry oxygen around the body, and collect carbon dioxide and take it back to the lungs where it can be sent out. There are millions of red blood cells in one small drop of blood. Do you know Why are they red?! These cells are red because they have a red-colored chemical called hemoglobin. They live for about months. But you should know all the cells in blood are not red. White blood cells are white and they do not carry oxygen, They defend the body against microbes. It is amazing that the number of white cells increases when you are sick.