What is life? Let’s face it, we still don’t agree on the answer. 4 billion years ago, conditions on earth were perfect to allow a few chemicals to get together and make biology. We, as humans, are intrinsically linked by evolution to these early biological molecules. But what happened to allow these chemical reactions to occur, ultimately leading to the creation of complex life? Some hypothesised that the emergence of life on earth may have been down to directed panspermia, others believe it was meteorites hitting the sea.