Definition: In this task, you are given a text of the article. Your task is to generate a headline (title) for this article.
Input: the largest snake the world has ever known -- as long as a school bus and as heavy as a small car - - ruled tropical ecosystems only six million years after the demise of the fearsome tyrannosaurus rex , according to a new discovery to be published on thursday in the journal nature .

world 's largest snake discovered in fossilized rainforest