Complex sentence: The Owls claim to have proof that such a tear, an expanding cosmic bubble, will eventually reach our solar system and a new universe, its properties calculated anywhere from apocalyptic to inconsequential, will be created.
Split into simpler sentences: The Owls claim to have proof, that such a tear, an expanding cosmic bubble, will eventually reach our solar system. And a new universe, it's properties calculated anywhere from apocalyptic to inconsequential will be created.