You're probably familiar with how the solar system looks today. There are eight officially recognized planets located more or less on the same plane, orbiting the sun. But have you ever given a thought to what it looked like billions of years ago? Things were very different back then.
We used to think the early solar system looked a bit like a dartboard, with concentric rings of material orbiting our sun. But a team of researchers now suggests that the early solar system actually looked more like a donut. They've determined this from a rather unlikely source: iron meteorites.
