The space firm will send a supply capsule into orbit, and then try a new way to recover the part of the rocket that carried it. If it works, the cost of going to space could reduce dramatically.
Once you become the boss, it's likely that you'll start to speak quite differently. The pitch, resonance and intensity of your speech change in ways that listeners can detect as signs of power.
President Obama in September set a formidable goal for American industry and agriculture — reduce greenhouse gases by a quarter in 10 years. But several states are ahead of the game.
Sure, you resolve to exercise more, but somehow it never happens. It could be that your environment is sabotaging you, psychologists say. A famous study about heroin and the Vietnam War explains how.