A team from the University of Bern in Switzerland argues that, due to its proximity to the sun, the proto-Earth that existed before this potential collision lost the volatile elements essential to form complex molecules. Any hydrogen, carbon, or sulfur, their analysis suggests, evaporated in just the first 3 million years after proto-Earth's formation. And so if Earth had evolved without external inputs, they say, it would probably be a drier world, more hostile to the development of complex life.
The core of Jupiter, the largest planet in our solar system, has long been a source of mystery for astronomers: an object so unfathomably dense and hot that it defies comprehension. Conventional theories have suggested for years that the gas giant's behemoth interior was formed following an enormous collision with an early planet. The "giant impact" theory suggests that roughly half of Jupiter's core originated from the remains of such a planet, explaining what researchers believe to be its strange, " fuzzy" interior.