In a more dangerous world, should we bring back compulsory military service? Or encourage volunteers instead?

Why do some children become bullies? And what is bullying like for the victim?

The social cost of selfish people, and how to deal with them.

Love may drive you crazy - but it also keeps you alive.

When the last individual of a species draws its last breath, that doesn't have to be the end of the story.

All living beings stop growing at some point. The global economy is different: it just keeps growing. Is a world without economic growth possible and what might that mean for the future?

All the great scientists have tried to come up with a theory of everything. All have failed.

What would happen to our bodies if we were all suddenly exposed to weightlessness in space?

If I borrow 500,000 euros from the bank, then the bank creates this money out of thin air. What's the catch?

Black holes can tell us a lot about the universe. But could they hold the key to understanding our world?