The invention of commercially viable instant cameras which were easy to use is generally credited to American scientist Edwin Land, who unveiled the first commercial instant camera, the model 95 Land Camera, in 1948, a year after unveiling instant film in New York City.
Dr. Oz Says: The Secret Cause of Nighttime Leg Cramps (and Other Muscle Cramps Too) is a Severe Magnesium Deficiency. And the Solution is High-Dose, High Absorbing Magnesium. But Don't Take the Low-Quality Magnesium Pills From the Drug Store.
Other causes can include medications such as birth control, diuretics (which are often prescribed for people with high blood pressure) and steroids. A lack of potassium or calcium can also be the underlying cause, as well as cold weather.. Acute leg cramps frequently are confused with restless legs syndrome (RLS). But RLS is a different and more serious, chronic condition characterized by discomfort and persistent throbbing and pulling sensations in the legs. How to Prevent Leg Cramps. There are a number ways you can alleviate nighttime leg cramps.