将以下文章中所有的大写字母变为小写，并删除所有句号。
文章：

"THE ELEPHANT IS AN HERBIVORE. IT HAS A TRUNK THAT IT USES TO PICK UP FOOD. ELEPHANTS ARE KNOWN FOR THEIR LONG MEMORIES."
the elephant is an herbivore it has a trunk that it uses to pick up food elephants are known for their long memories