Mercury
No, not the element…the planet. Scientists have noted that there is a 1% chance its orbit could be made unstable by Jupiter’s gravitational pull. Simulations lead to four possible outcomes: ejection from the Solar System, falling into the Sun, colliding with Venus, or colliding with Earth.
Note: the 1% chance refers to the lifetime of the Sun. So the possibility of this happening within 1,000 years is rather slim. But who knows?