A new study estimates that Earth has almost 8.8 million species, but we've only discovered about a quarter of them. And some of the yet-to-be-seen ones could be in our own backyards, scientists say. So far, only 1.9 million species have been found.
There is not a statute of limitations for all crimes, as murder can be punishable at any time, but lesser crimes, such as misdemeanors are generally subjected to statutes of limitations.
There are also statutes of limitations on bringing criminal charges, but homicide generally has no time limitation on prosecution. The limitations (depending on the state) generally range from 1 to 6 years except for in Rhode Island, which uses 10 years for several causes of action.