Doctor Who has never pretended to be hard science fiction... At best Doctor Who is a fairytale, with fairytale logic about this wonderful man in this big blue box who at the beginning of every story lands somewhere where there is a problem...
Neil GaimanHe stared up at the stars: and it seemed to him then that they were dancers, stately and graceful, performing a dance almost infinite in its complexity.
Neil GaimanSpider venom comes in many forms. It can often take a long while to discover the full effects of the bite. Naturalists have pondered this for years: there are spiders whose bite can cause the place bitten to rot and to die, sometimes more than a year after it was bitten. As to why spiders do this, the answer is simple. It's because spiders think this is funny, and they don't want you ever to forget them.
Neil Gaiman