pseudoscience

Hans Rosling's TEDxSummit talk asks whether some religions have higher birth rates and how that affects population growth. He charts data across time and religions and reaches a surprising conclusion about fertility.

Sam Harris's talk at the 2012 Global Atheist Convention on the secular attitude toward death and living in the present moment, with a guided meditation element.

A re-upload of Rupert Sheldrake's TEDx talk The Science Delusion, which TED removed from its channel. He challenges what he calls the dogmas of modern science, including whether fundamental constants are constant.

A talk given at the 2011 Nammour Symposium at Sacramento State arguing that past generations were wrong about nearly everything, so we should expect to be wrong too. It tours the many surprising ways scientific beliefs have failed, drawing on pessimistic induction.

Gary Yourofsky's 2010 lecture at Georgia Tech arguing for veganism on ethical, health and environmental grounds. It is a long, forceful animal-rights speech.