Three things you should know:
1. Spending your days volunteering might be a waste of time. Princeton philosopher Peter Singer tells us about "effective altruism."
2. Algorithms can discriminate just like people. Seeta Pena Gangadharan of the London School of Economics explains how relying too much on math can be a bad thing.
3. You don’t know your best friend as well as you think. Nicholas Epley, author of “Mindwise,” looks at why we misunderstand even those closest to us.
And this week's music:
Red Hot Chili Peppers: Give It Away
