Your doctor may need to change the doses of your medications or monitor you carefully for side effects. ... Metformin side effects can also affect other parts of the body. It can leave a metallic taste in the mouth, cause heartburn or headache, flushing of the skin, nail changes or muscle pain. More serious metformin side effects include chest pain or rash. ...
Early String Theory. The first attempt to construct a physical model of an atom was made by William Thomson (later elevated to Lord Kelvin) in 1867. The most striking property of the atom was its permanence.
Answer Wiki. The concept of parallel universe arises from the String Theory which is exactly opposite of the Big Bang Theory. Big Bang says that there is only one universe and it is continuously changing, whereas String Theory says that there are infinite number of universes parallel to each other, like beads on a string.