People in history: William Dampier

Born in 5/11/1651, was an English buccaneer, sea captain, author and scientific observer. Dampier influenced several figures better known than he: His observations and analysis of natural history helped Charles Darwin’s and Alexander von Humboldt’s development of their theories. He made innovations in navigation technology that were studied by James Cook and Horatio Nelson. He

Heteropaternal Superfecundation

Heteropaternal superfecundation is common in animals such as cats and dogs. Stray dogs often produce litters in which every puppy has a different father. Though rare in humans, many cases have been documented. In 1810, American physician John Archer documented a case in which a white woman gave birth to mixed twins one white, one