Why have we not yet found proof of alien life? According to astrophysicist Avi Loeb, we simply haven't dedicated the proper resources. Diving into unidentified phenomena such as the Oumuamua asteroid, he explores his scientific search for extraterrestrial technology, envisioning a future where a higher interstellar intelligence helps us improve ...

Bill Ackman has made billions of dollars — and a name for himself — as an activist investor, buying up stock to push for change at companies. In this wide-ranging conversation with author and business ethics professor Alison Taylor, Ackman discusses how he's bringing his activism into the social and political spheres — and shares his thoughts on...

NOTE FROM TED: Theories discussed in this talk remain an ongoing field of study. TEDx events are independently organized by volunteers. The guidelines we give TEDx organizers are described in more detail here: http://storage.ted.com/tedx/manuals/tedx_content_guidelines.pdf The scientific community has historically disregarded studies of extrate...

Based on the premise that we are not special, Loeb argues for modesty from a cosmic perspective. His “principle of cosmic modesty” implies that both primitive and intelligent forms of life should exist away from Earth, and we should therefore search for them without prejudice.