Things to remember. 1  Myasthenia gravis is an autoimmune disease that causes muscle weakness. 2  The symptoms are caused by the immune system interfering with the transmission of messages from the nervous system to the muscles. 3  There is no cure, but the symptoms can be managed.
Lake Nipigon is the largest inland lake in Ontario. Only the Great Lakes are larger. Lake of the Woods is actually 11% smaller even though it has a reputation for being the largest. Lake Nipigon consists of 2802 miles 2 (4510 km 2) of pristine water and dotted with hundreds of islands.
Nickel is one of the primary elements of the Earth's core which is thought to be made mostly of nickel and iron. It is also found in the Earth's crust where it is about the twenty-second most abundant element. Most nickel that is mined for industrial use is found in ores such as pentlandite, garnierite, and limonite. The largest producers of nickel are Russia, Canada, and Australia. Nickel is also found in meteorites where it is often found in conjunction with iron.