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.
The time limits that statutes of limitations establish vary from one state to another and according to the seriousness of a crime. In general, the more serious a crime, the more time a state has to begin criminal proceedings.