What’s the weirdest planet in the solar system?

Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with atmosphere, they have a wide range of characteristics distinguishing them. But if I was backed into a corner, which one would I choose as the oddest of them all? Easy: Venus is the weirdest planet in the solar system. There’s a reason we call it Earth’s evil twin. For reasons that are still unclear, long ago it suffered a massive runaway greenhouse effect, filling its atmosphere.