There’s long been speculation about mystery objects in our solar system. A tenth planet hiding out behind the orbit of Pluto, a dark companion of the sun and even a “killer planet” by the name of Nibiru.
Much of that is nonsense or speculation by Doomsday prophets. However, scientists have reasons to believe there may be an undiscovered planet as yet out there…
There’s New Evidence for the Mysterious Mega-Earth Known as Planet 9 | @curiositydotcom