I just learned this ideas a couple days ago:
There are about 5 mass extinctions in Earth's history according to fossil record. According to the pattern, it seems like we are due for one.
My Bio teacher told me that the extinctions already began, but not directly apply to human becaues human are the one who caused it. We are destorying rain forests, every week, there are 40+ spieces becoming extinct. We don't have a chance to study those spieces before they become extinct, therefore, we might destory the cure to cancer and other 'uncurable' dieseases. We going to end up making ourself extinct.
Do you agree?