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Geoffrey Kent is a pioneer of the photographic safari. His motto: Shoot with a camera, not a gun. After all, we can't afford to keep killing endangered animals.

Behavioral economists see humanity as a giant irrational mass. Yet that doesn't mean they're innate pessimists. Rather, they see a giant blank canvas on which masterpieces can be built.

Companies like Amazon take advantage of the fact that they know a whole lot more about buying patterns than you do. As author and entrepreneur Jerry Kaplan explains, this sort of information asymmetry is the real crux of their business plan.

And now for something totally different…

What's the best way to help someone with PTSD? Understand it.

The actor and activist dishes on same-sex marriage and the historical precedent for granting additional freedoms to the oppressed and disenfranchised.

Science needs to be about discovery, not rote memorization.

Dr. Dan-el Padilla Peralta, a former undocumented immigrant himself, argues that Trump's acolytes need to take a look into their own ancestral mirror before passing judgement on America's immigrants.

Don't sell out, says designer Tina Roth Eisenberg. If somebody wants to give you money in exchange for eyeballs, just make sure that it adds value to whoever is reading your site.

Mentalists rely on the power of suggestion to glean information from audience members. Thus, keen communication skills are essential.

It's Tuesday, which means we've got another submitted question for Bill Nye to answer. The topic this week is the same as last week: black holes.

Leadership is accessible to each of us—today. It requires a process of hard work, willingness to ask questions, and openness to learning.

Leadership is accessible to each of us—today. It requires a process of hard work, willingness to ask questions, and openness to learning.

Leadership is accessible to each of us—today. It requires a process of hard work, willingness to ask questions, and openness to learning.

Leadership is accessible to each of us—today. It requires a process of hard work, willingness to ask questions, and openness to learning.

Leadership is accessible to each of us—today. It requires a process of hard work, willingness to ask questions, and openness to learning.

Leadership is accessible to each of us—today. It requires a process of hard work, willingness to ask questions, and openness to learning.

Contrary to popular belief, leadership really can be learned.

Does the typical college student understand the sort of mental health care options available to them? Dr. Judith Brisman of Eating Disorder Resource Center continues our series "Big Thinkers on Mental Health."

Also: Hear the powerful story behind how Mister Sulu got his name.