An MRI (or magnetic resonance imaging) scan is a radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures.The MRI scanner is a tube surrounded by a giant circular magnet. The patient is placed on a moveable bed that is inserted into the magnet.n MRI scan can be used as an extremely accurate method of disease detection throughout the body and is most often used after the other testing fails to provide sufficient information to confirm a patient's diagnosis. In the head, trauma to the brain can be seen as bleeding or swelling.
Another type of smoke detector was invented by NASA for use in space. The first edition of this device was introduced to the Skylab in 1973. This was necessary to to the requirement of adjustable sensitivity for the space station.
On November 3, 1957, Laika the dog rode Sputnik 2 into outer space, the first living creature to reach Earth orbit-but unlike all the animals and humans who followed, hers was a one-way ticket only.n November 3, 1957, Laika the dog rode Sputnik 2 into outer space, the first living creature to reach Earth orbit-but unlike all the animals and humans who followed, hers was a one-way ticket only.