Today in History: September 1, World War II starts with invasion of Poland
Historical events on Sept. 1 include Nazi Germany's 1939 invasion of Poland, extinction of the passenger pigeon, devastating earthquakes, and other political and cultural milestones.
A billionaire will pay a lot of money to shoot a recreated being': historian Sadiah Qureshi on extinction and empire
The very idea of de-extinction raises profound questions about the meaning of extinction and how we treat life, whether living, endangered, dead or extinct.