Facial expressions arise from brain networks that encode slow, context-rich meaning and fast muscle control on different time scales, keeping smiles and threats socially precise.

Add Yahoo as a preferred source to see more of our stories on Google. You prepared thoroughly for a presentation at work, and now you’re dropping wisdom to a packed room. Much as you expected, your ...

[Note: This practice involves our visual system, which for many people is impaired. If this is the case for you, you could adapt my suggestions to focus on the voices of others.] As our ancestors ...

You prepared thoroughly for a presentation at work, and now you’re dropping wisdom to a packed room. Much as you expected, your colleagues appear wowed and ...

Photo-Illustration by Chloe Dowling for TIME (Source Images: Klaus Vedfelt—Getty Images, Tim Robberts—Getty Images, Kelvin Murray—Getty Images, Robert Recker—Getty Images, Howard Kingsnorth—Getty ...