Imagine you're on your way to Mars, and you lose a crucial tool during a spacewalk. Not to worry, you'll simply re-enter your spacecraft and use some microorganisms to convert your urine and exhaled carbon dioxide into chemicals to make a new one.
A team of astronomers have discovered that the core of our sun rotates about four times faster than the surface. It's in the middle of our solar system, on our cosmic doorstep, so how could we have missed that before? And why is it important?