The philosophy of life from comedian, author, and woodworker Nick Offerman.

In practice, no one has ever developed a democracy that works particularly well if judged in absolute terms. But all the alternatives so far have been worse.

Michelle Thaller from NASA examines if it's possible to put up a giant disk to block out the sun's rays and cool Earth.

The U.S military is the most powerful in the world but its cost and usefulness are worth debating.

Current physician and former NASA astronaut Scott Parazynski knows a thing or two about out-of-this-world success.

For a drug with zero fatalities and huge money-making possibilities, why is marijuana illegal in the first place? Author Johann Hari runs us through why he thinks it should be legal.

Has the constant barrage of political news got you down? Yale University historian Timothy Snyder has a solution.

Writer Michael Hobbes says there are too many stereotypes about millennials.

Social entrepreneur Miki Agrawal explains what makes a perfect business partner.

Sabine Hossenfeder has some problems with how it's practiced today.

U.S. Army strategist and military historian Danny Sjursen says Americans don't value all lives the same.

Women have different financial strategies and insight than men, argues Sallie Krawcheck, the co-founder and CEO of Ellevest, a digital investment platform for women.

Workplace discrimination is often subtle but very real, says financial educator and author Alvin Hall.

Author Johann Hari says our jobs may be at the root of widespread depression and anxiety.

As robots and automation take over jobs, there will still be some occupations where humans will be preferred, says theoretical physicist and best-selling author Michio Kaku.

American companies like Amazon and Netflix are already using artificial intelligence, says data scientist Michael Li, and ones that will not adapt will be left behind.

Author Scott Hartley says we don't have to be afraid of the coming AI – we should put it to work for us in fighting our own biases.

If we ever discover the true size of the universe, we'll likely have galaxies to thank. The trillions of massive star clusters we've observed are sending light from the early universe back to us.

Eugene Gholz, the associate professor of political science at the University of Notre Dame, posits that President Trump's decision to suspend U.S. military operations on the Korean peninsula negates decades of foreign policy.