@CNN: Pluto is most definitely a planet, say some scientists who argue that it should never have been downgraded https://t.co/4ksqx9lQpH https://t.co/yjkg2Z89BO

@CNN: Pluto is most definitely a planet, say some scientists who argue that it should never have been downgraded https://t.co/4ksqx9lQpH https://t.co/yjkg2Z89BO