\" \" A group of scientists is suggesting that the rise of a host of unique animal life is tied to panspermia, a seeding of the Earth that enabled many bizarre and never-before-seen creatures to descend from organic alien material. It smashes into a planet, causing destruction — but also bringing life. Panspermia (meaning 'seeds everywhere') is the name of the theory that life on Earth may have cosmic origins, and it's been both debated by scientists and featured in works of science fiction. \"We are acutely aware that mainstream thinking on the origin and further evolution of life on Earth is anchored ﬁrmly in the 'Terrestrial' paradigm,\" write the authors. Panspermia is at this point only a concept, but it dates back well before the last hundred years or so of modern science fiction.