The Single Bullet Theory (or Magic Bullet Theory, as it is commonly called by its critics) was introduced by the Warren Commission in its investigation of the assassination of President John F. Kennedy to explain what happened to the bullet which struck Kennedy in the back and exited through his throat. Given the lack of damage to the presidential limousine consistent with it having been struck by a high-velocity bullet and the fact that Texas Governor John Connally was wounded and was seated directly in front of the president, the Commission concluded they were likely struck by the sa...

Marsupials are an infraclass of mammals living primarily in the Southern Hemisphere; a distinctive characteristic, common to most species, is that the young are carried in a pouch. Well-known marsupials include kangaroos, koalas, possums, opossums, wombats and the Tasmanian devil. Marsupials represent the clade originating with the last common ancestor of extant metatherians. Like other mammals in the Metatheria, they are characterized by giving birth to relatively undeveloped young, often residing in a pouch with the parent for a certain time after birth. Close to 70% of the 334 extant...