Can't seem to match the energy of a good friend? You might be on opposite ends of the personality spectrum — and that's OK.

All the bold ideas, inventions and perspectives of the beloved TED Talks conference and video series, plus special follow-up interviews with the people behind them.

You know that friend who seems quiet in groups but becomes a total chatterbox when you’re one-on-one? Or the person who’s always the life of the party but gets weirdly focused when they’re working ...