How to get moral 'free-riders' to cooperate

What motivates people to contribute to trustful moral judgment, which is a public good yet tends to be costly? This is 'the moral free rider problem'. Mathematician Tatsuya Sasaki from University of Vienna and colleagues ...

Silence in the sky—but why?

(Phys.org) —Scientists as eminent as Stephen Hawking and Carl Sagan have long believed that humans will one day colonise the universe. But how easy would it be, why would we want to, and why haven't we seen any evidence ...

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