Overview: https://scitechdaily.com/earths-hidden-guests-strange-blobs-in-deep-mantle-are-the-remains-of-an-ancient- A new NASA and Durham University

Photo Gallery

Planetary collision simulations  - from an asteroid to a Mars-sized planet
Planetary collisions simulated by supercomputer
This is a simulation if 2 Planets were to collide
Mars collision with rogue planet (SPH simulation)
Collision of planetesimals (SPH simulation)
Simulation of Theia’s Collision With Earth
What If Earth Collided With Every Planet? (SIMULATION)
SST - protoplanetary disk (kind of)
Planet Collision Comparison
New Supercomputer Simulation Sheds Light on Moon’s Origin